DIAGNOSIS AND TESTING

501-11-1 Glass, Frames and Mechanisms 501-11-1 DIAGNOSIS AND TESTING Glass, Frames and Mechanisms Refer to Wiring Diagrams Cell 56 for schematic and connector information. Refer to Wiring Diagrams Cell 100 for schematic and connector information. Special Tool(s) 73III Automotive Meter 105-R0057 or equivalent Principles of Operation The LF window motor is an 8-pin motor with integral electronics. The front window control switch sends 3 separate signals to the LF window motor: UP, DOWN and AUTO. The front window control switch provides a 12-volt signal to the motor to request an up or down operation. When AUTO UP or AUTO DOWN are requested, the front window control switch provides a 12-volt signal on the up or down line and a ground signal on the AUTO line simultaneously. The up and down contacts are tied to ground and the AUTO contact is floating within the front window control switch when the switch is in the NEUTRAL position. The up, down and AUTO feeds to the motor are all low current. The LF window motor plastic pinion gear is mated to the drum housing of a dual rail drum and cable window regulator. The motor is attached to the drum housing (plastic) by 3 screws. The motor uses internal Hall-effect sensor feedback coupled to the microprocessor to determine window position and operate the window. If the Hall-effect pulses are not being received by the microprocessor, the motor will run for approximately 1/10 second each switch press. The motor contains a thermal breaker to protect the motor windings from overcurrent/overtemperature operation. Continued successive operation of the motor will cause the thermal breaker to open, causing a loss of function until the motor cools. The LF window motor operates with the ignition switch in the RUN/ACC positions only (and delayed accessory) and is sensed via the delayed accessory and logic ground inputs. The motor is supplied with B+ power and draws a key-off load of approximately 3/4 ma. All of the high current required to move the window is supplied through the B+ and motor ground inputs. The loss of either logic or motor ground will cause this system to become inoperative. For correct functionality, both power feeds and both ground feeds must be intact at the motor. During an AUTO UP or AUTO DOWN function, movement of the window can be stopped by actuating the switch to any position (UP, DOWN, AUTO UP, AUTO DOWN). The switch must then be released before the window will carry out the next commanded movement. When an obstacle has been detected in the window opening as the window is moving upward, the window will automatically reverse direction and move toward the FULL OPEN position (in both proportional up and one-touch up modes). This is known as bounce-back. Once the window stops at its bounce-back position, and within 2 seconds the switch is pressed again and held in the AUTO UP position, the window will travel up with no bounce-back protection (security override). If the switch is released before the window reaches FULL CLOSED, the window will stop with bounce-back, automatically re-enabled for the next window up movement. If the ignition switch is turned to OFF or START (without delayed accessory), the window will stop. The only exception is when an obstacle is detected while delayed accessory is lost. In this case the window will bounce back, then stop. Ice, contaminant buildup and environmentally induced tight spots in the window seals are all possible uses for the security override feature. If an obstruction occurs between 4 and 200 mm (0.15-7.9 inch) of window opening, the bounce-back position will be 250 mm (9.8 inch) of window opening. If an obstruction occurs at a position greater than 200 mm (7.9 inch) of window opening, the bounce-back position will be 50 mm (2 inch) below where the obstruction occurred. Copyright 2004, Ford Motor Company Last updated: 2/14/2008

501-11-2 Glass, Frames and Mechanisms 501-11-2 The LF window motor will retain its initialization (memory) if B+ power is removed while the window is not in motion. If B+ power is disconnected from the LF window motor while the window is in motion, the motor will enter position recovery mode when power is restored (AUTO UP and AUTO DOWN functions are disabled). Position recovery mode allows proportional up (and down) movement of the window until the LF window motor stalls the window glass into the upper header seal. If no internal or external faults are present, the motor will automatically resume normal (full) operation. The front window control switch is supplied with illumination and illumination ground inputs used to illuminate the switch when the headlamp switch is turned to the PARK or ON position (the AUTOLAMP position may also energize this input). These switch inputs do not directly affect operation of the LF window. The front window control switch uses the delayed accessory power input which is transferred to the up or down outputs via closing of a switch contact. The front window control switch uses the main switch ground input which is transferred to the AUTO output via closing of a switch contact. If the delayed accessory feed to the front window control switch is missing, none of the windows will function. If the main ground signal is missing, the LF AUTO functions will be inoperative and the remaining 3 windows will also be inoperative. If the front window control switch, or its associated wiring, develops an open circuit, that function will become inoperative. If the up contact or associated wiring develops an open circuit, the LF window will only move down or one-touch down. If the down contact or associated wiring develops an open circuit, the LF window will only move up or one-touch up. If the auto contact or associated wiring develops an open circuit, the LF window will only move proportionally up or down. The LF window motor will suspend window operation if a switch error exists. A switch error is defined as UP and DOWN, AUTO without up or down, or up and down and AUTO energized at the same time. The LF window will appear to be inoperative if a switch error is present A new LF window motor will be in proportional up/down mode prior to initialization. The motor will respond to a proportional up or down switch actuation only and bounce back is disabled. If the switch is actuated to the AUTO UP or AUTO DOWN position and released, window movement will stop when the up or down contact in the front window control switch is released. If the LF window motor is removed from the window regulator drum housing, or if a new LF window motor is installed, the LF window motor must be initialized. Refer to Door Window Motor Initialization in this section. The LF window motor will automatically adjust to system changes throughout its life: changes in seal drag and slight changes in the FULL OPEN position will occur and are automatically compensated for. Once initialized, the LF window motor will soft stall into the UPPER and LOWER positions contributing to extended durability of the system. If the LF window does not seal completely in the FULL UP position (very small gaps/non bounce-back events only), the LF window switch can be actuated to the proportional up position and the window will be energized long enough to fully seal (for a small fraction of a second) and this new position will be learned. Rear Window Defrost The instrument cluster module (ICM) controls the rear window defrost grid and heated mirrors by controlling the state of the rear window defrost/mirror relay. When the rear window defrost switch is pressed, the ICM will activate the heated grid relay. When the heated grid relay is active, both the rear window defrost grid and heated mirror elements will be energized. The ICM will deactivate the heated grid relay when one of the following conditions is met: The rear window defrost switch is pressed when the feature is active. Ignition switch state is changed from RUN to OFF/LOCK. The 10-minute timing function is completed. Inspection and Verification 1. Verify the customer concern by operating the power window/defrost system. 2. Visually inspect for obvious signs of mechanical and electrical damage. Refer to the following chart:

501-11-3 Glass, Frames and Mechanisms 501-11-3 Visual Inspection Chart 4. If the concern is not visually evident, determine Mechanical Electrical the symptom. GO to Symptom Chart Glass, Frames and Mechanisms. Window regulator Fuse(s) assembly Circuitry Window motor Window control switch Window glass Relay(s) Window control switch LF motor not initialized 3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step. Symptom Chart Symptom Chart Glass, Frames and Mechanisms Condition Possible Sources Action All power windows are Battery junction box (BJB) GO to Pinpoint Test A. inoperative fuses: 6 (60A). 29 (60A). BJB circuit breaker 62 (30A). Central junction box (CJB) fuses: 17 (15A). 6 (5A). Circuitry. Front window control switch. Instrument cluster module (ICM). Delayed accessory relay. The LF power window is BJB fuse 19 (30A). GO to Pinpoint Test B. inoperative CJB fuse 6 (5A). Circuitry. Front window control switch. LF power window motor.

501-11-4 Glass, Frames and Mechanisms 501-11-4 Symptom Chart Glass, Frames and Mechanisms Condition Possible Sources Action The LF power window will The window system was REINITIALIZE the LF not close (bounces back) repaired and the LF motor motor. REFER to Door was not reinitialized. Window Motor Initialization. Glass runs are not fully Carefully use a rubber mallet seated. to reseat the glass runs, then REINITIALIZE the LF motor. REFER to Door Window Motor Initialization. Dirt or contaminants are REMOVE/CLEAN the glass present in the glass runs or runs or beltlines, then beltline moulding. REINITIALIZE the LF motor. REFER to Door Window Motor Initialization. Binding in the inner/outer REMOVE and REINSTALL beltline moulding. the inner/outer beltlines. INSTALL new if necessary, then REINITIALIZE the LF motor. REFER to Door Window Motor Initialization. Window regulator is out of Using the security override position. function, POSITION the glass in the FULL UP position. LOOSEN the four window regulator rail bolts. TIGHTEN the four window regulator rail bolts. REINITIALIZE the LF motor. REFER to Door Window Motor Initialization. Front glass channel (lower LOWER the glass to the portion) is out of position. FULL DOWN position. LOOSEN the glass channel bolt. TIGHTEN the glass channel bolt. REINITIALIZE the LF motor. REFER to Door Window Motor Initialization. Window system components CHECK the torque on the LF are loose. motor screws, window glass-to-regulator bolts, regulator rail bolts, glass channel bolt and the door carrier fasteners. REINITIALIZE the LF motor. REFER to Door Window Motor Initialization. The RF power window is Circuitry. GO to Pinpoint Test C. inoperative Front window control switch. RF power window motor. The LR or RR power window Circuitry. GO to Pinpoint Test D. is inoperative Front window control switch. LR window control switch. LR power window motor. RR window control switch. RR power window motor.

501-11-5 Glass, Frames and Mechanisms 501-11-5 Symptom Chart Glass, Frames and Mechanisms Condition Possible Sources Action The one-touch up/down Circuitry. GO to Pinpoint Test E. feature is inoperative LF power window motor. Front window control switch. LF motor not initialized. B+ power was lost while LF window was operating. The defrost system is Fuse(s). GO to Pinpoint Test F. inoperative Circuitry. Dual automatic temperature control (DATC) module. Heated backlight relay. Instrument cluster module (ICM). The defrost system will not Circuitry. GO to Pinpoint Test G. shut off automatically Heated backlight relay. Instrument cluster module (ICM). The delayed accessory is BJB fuses: GO to Pinpoint Test H. inoperative 6 (60A). 29 (60A). BJB circuit breaker 62 (30A). CJB fuses: 17 (15A). 6 (5A). Circuitry. Delay accessory relay. Instrument cluster module (ICM). Connector Circuit Reference Instrument Cluster Module C220a Pin Number(s) Circuit Designation/Description rmal Condition/Measurement 4 CKT 1009 (OG/YE) heated backlight relay Greater than 8 volts with key ON. 5 CKT 1004 (LB/RD) delayed accessory relay Greater than 8 volts.

501-11-6 Glass, Frames and Mechanisms 501-11-6 DATC Module C228a Pin Number(s) Circuit Designation/Description rmal Condition/Measurement 12 CKT 688 (GY/LB) Greater than 10,000 ohms to chassis ground and 0 volts. Heated Backlight Power Relay C402a Pin Number(s) Circuit Designation/Description rmal Condition/Measurement 1 CKT 186 (BN/LB) power Greater than 10 volts with key ON and rear window defrost ON. Heated Backlight Ground C402b Pin Number(s) Circuit Designation/Description rmal Condition/Measurement 1 CKT 1205 (BK) ground Less than 5 ohms to chassis ground.

501-11-7 Glass, Frames and Mechanisms 501-11-7 Front Power Window Control Switch C3193a Pin Number(s) Circuit Designation/Description rmal Condition/Measurement 1 CKT 777 (YE) or CKT 2018 (LB/OG) or Greater than 6 volts. CKT 2018 (OG/YE) driver auto (one-touch up/down) 2 CKT 991 (TN/LB) LF window down Approximately 700 to 800 ohms to chassis ground and 0 volts. 3 CKT 992 (WH/BK) LF window up Approximately 700 to 800 ohms to chassis ground and 0 volts. 4 CKT 316 (YE/LB) LR window down Greater than 10,000 ohms to chassis ground and 0 volts. 7 CKT 170 (RD/LB) lock-out power feed Greater than 10,000 ohms to chassis ground and 0 volts. 8 CKT 317 (GY/OG) LR window up Greater than 10,000 ohms to chassis ground and 0 volts. Front Power Window Control Switch C3193b Pin Number(s) Circuit Designation/Description rmal Condition/Measurement 1 CKT 319 (YE/BK) RR window up Greater than 10,000 ohms to chassis ground and 0 volts. 2 CKT 314 (TN/LB) RF window down Greater than 10,000 ohms to chassis ground and 0 volts. 3 CKT 313 (WH/YE) RF window up Greater than 10,000 ohms to chassis ground and 0 volts. 4 CKT 1205 (BK) LF window control switch Less than 5 ohms to chassis ground. ground

501-11-8 Glass, Frames and Mechanisms 501-11-8 Pin Number(s) Circuit Designation/Description rmal Condition/Measurement 5 CKT 320 (RD/BK) RR window down Greater than 10,000 ohms to chassis ground and 0 volts. 6 CKT 400 (LB/BK) accessory delay power Greater than 10 volts with the key ON or feed ACC and with the delayed accessory power present. LF Door Power Window Motor C518 Pin Number(s) Circuit Designation/Description rmal Condition/Measurement 2 CKT 400 (LB/BK) delay accessory feed Greater than 10 volts with the key ON or ACC and with the delayed accessory power present. 3 CKT 992 (WH/BK) LF window up Less than 5 ohms to chassis ground. Greater than 10 volts with the key ON or ACC and with the delayed accessory power present and the front window control switch depressed in the UP position. 4 CKT 991 (TN/LB) LF window down Less than 5 ohms to chassis ground. Greater than 10 volts with the key ON or ACC and with the delayed accessory power present and the front window control switch depressed in the DOWN position. 5 CKT 1203 (BK/LB) or CKT 875 (BK/LB) Less than 5 ohms to chassis ground. logic ground 6 CKT 777 (YE), CKT 2018 (LB/OG) or CKT Greater than 10,000 ohms to chassis ground 2018 (OG/YE) driver auto (one-touch and 0 volts. Less than 5 ohms to chassis up/down) ground when front window control switch is depressed to the AUTO position for the LF window. 7 CKT 1001 (WH/YE) LF window power Greater than 10 volts with the key ON or OFF. 8 CKT 1205 (BK) or CKT 57 (BK) LF motor Less than 5 ohms to chassis ground. ground

501-11-9 Glass, Frames and Mechanisms 501-11-9 RF Door Power Window Motor C608 Pin Number(s) Circuit Designation/Description rmal Condition/Measurement 1 CKT 313 (WH/YE) UP window motor feed Less than 5 ohms to chassis ground. Greater 10 volts when front window control switch is depressed for the RF window UP position with the key ON or ACC and with the delayed accessory power present. 2 CKT 314 (TN/LB) DOWN window motor Less than 5 ohms to chassis ground. Greater feed than 10 volts when front window control switch is depressed for the RF window DOWN position with the key ON or ACC and with the delayed accessory power present. LR Power Window Control Switch C701 Pin Number(s) Circuit Designation/Description rmal Condition/Measurement 2 CKT 316 (YE/LB) RF window down feed Less than 5 ohms to chassis ground. Greater from LF window control switch than 10 volts when front window control switch is depressed in the DOWN position for the LR window with the key ON or ACC and with the delayed accessory power present. 3 CKT 885 (YE/LB) LR window down Greater than 10,000 ohms to chassis ground and 0 volts. 4 CKT 170 (RD/LB) switched accessory delay Greater than 10 volts when LF window power feed (lockout) switch is in the UNLOCK position with the key ON or ACC and with the delayed accessory power present.

501-11-10 Glass, Frames and Mechanisms 501-11-10 Pin Number(s) Circuit Designation/Description rmal Condition/Measurement 7 CKT 884 (YE/BK) LR window up Greater than 10,000 ohms to chassis ground and 0 volts. 8 CKT 317 (GY/OG) LR window up feed Less than 5 ohms to chassis ground. Greater from LF window control switch than 10 volts when front window control switch is depressed in the UP position for the LR window with the key ON or ACC and with the delayed accessory power present. LR Door Power Window Motor C703 Pin Number(s) Circuit Designation/Description rmal Condition/Measurement 1 CKT 881 (BN) UP window motor feed Less than 5 ohms to chassis ground. Greater than 10 volts when LR window control switch is depressed UP with the key ON or ACC and with the delayed accessory power present. 2 CKT 882 (BN/YE) DOWN window motor Less than 5 ohms to chassis ground. Greater feed than 10 volts when LR window control switch is depressed DOWN with the key ON or ACC and with the delayed accessory power present. RR Power Window Control Switch C801

501-11-11 Glass, Frames and Mechanisms 501-11-11 Pin Number(s) Circuit Designation/Description rmal Condition/Measurement 2 CKT 320 (RD/BK) RR window down feed Less than 5 ohms to chassis ground. Greater from LF window control switch than 10 volts when front window control switch is depressed in the UP position for the RR window with the key ON or ACC and with the delayed accessory power present. 3 CKT 882 (BN/YE) RR window down Greater than 10,000 ohms with chassis ground and 0 volts. 4 CKT 170 (RD/LB) switched accessory delay Greater than 10 volts when LF window power feed (lockout) switch is in the UNLOCK position with the key ON or ACC and with the delayed accessory power present. 7 CKT 881 (BN) RR window up Greater than 10,000 ohms to chassis ground and 0 volts. 8 CKT 319 (YE/BK) RR window up feed from Less than 5 ohms to chassis ground. Greater LF window control switch than 10 volts when front window control switch is depressed in the UP position for the RR window with the key ON or ACC and with the delayed accessory power present. RR Door Power Window Motor C803 Pin Number(s) Circuit Designation/Description rmal Condition/Measurement 1 CKT 881 (BN) UP window motor feed Less than 5 ohms to chassis ground. Greater than 10 volts when RR window control switch is depressed UP with the key ON or ACC and with the delayed accessory power present. 2 CKT 882 (BN/YE) DOWN window motor Less than 5 ohms to chassis ground. Greater feed than 10 volts when RR window control switch is depressed DOWN with the key ON or ACC and with the delayed accessory power present. Pinpoint Test A: All Power Windows Are Possible Causes Inoperative Inoperative front power window control switch rmal Operation Inoperative delay accessory relay Under normal operation the front power window An open in circuit 400 (LB/BK) or circuit 1205 control switch receives power from the delay (BK) accessory relay through circuit 400 (LB/BK) and is grounded to chassis through circuit 1205 (BK).

501-11-12 Glass, Frames and Mechanisms 501-11-12 A1 PINPOINT TEST A: ALL POWER WINDOWS ARE INOPERATIVE CHECK CIRCUIT 400 (LB/BK) FOR VOLTAGE Disconnect: Front Power Window Control Switch C3193b. Ignition ON. Measure the voltage between front power window control switch C3193b-6, circuit 400 (LB/BK) and ground. A2 GO to A3. Is the voltage greater than 10 volts? GO to A2. CHECK CIRCUIT 400 (LB/BK) FOR AN OPEN Ignition OFF. Disconnect: Accessory Delay Relay. Measure the resistance between front power window control switch C3193b-6, circuit 400 (LB/BK) and accessory delay relay socket pin 87, circuit 400 (LB/BK). A3 GO to Pinpoint Test H to diagnose the accessory delay relay system. REPAIR circuit 400 (LB/BK) for an open. Is the resistance less than 5 ohms? TEST the system for normal operation. CHECK CIRCUIT 1205 (BK) OR CIRCUIT 57 (BK) FOR AN OPEN Ignition OFF. Measure the resistance between front power window control switch C3193b-4, circuit 1205 (BK) or circuit 57 (BK) and ground. INSTALL a new front power window control switch. REFER to Window Control Switch in this section. REPAIR circuit 1205 (BK) or circuit 57 (BK) for an open. TEST the system for Is the resistance less than 5 ohms? normal operation.

501-11-13 Glass, Frames and Mechanisms 501-11-13 Pinpoint Test B: The LF Power Window Is Inoperative rmal Operation NOTE: The LF door power window motor is not on the multiplex link. NOTE: A new LF door power window motor will be in proportional up/down mode until initialized. Refer to Door Window Motor Initialization in this section. NOTE: The LF door power window motor must be reinitialized whenever: the motor is removed from the window regulator drum housing, a new motor is installed, a new window regulator is installed, a new window glass is installed, a new top run is installed or any operation where grease or lubricants are applied to the window system. Under normal operation the front power window control switch receives power from the delay accessory relay through circuit 400 (LB/BK) and is grounded to chassis through circuit 1205 (BK). When the front window control switch is operated in the UP position the LF motor receives power through circuit 992 (WH/BK). When the front window control switch is operated in the DOWN position the LF motor receives power through circuit 991 (TN/LB). When the LF window motor receives a ground signal on circuit 777 (YE), circuit 2018 (LB/OG) or circuit 2018 (OG/YE) the LF window motor will enter one-touch up/down. Possible Causes Inoperative LF door power window motor Inoperative front power window control switch LF motor not initialized Open in circuits 400 (LB/BK), 1001 (WH/YE), 777 (YE), 991 (TN/LB), 992 (WH/BK), 1203 (BK/LB)/875 (BK/LB) or 1205 (BK)/57 (BK) B1 PINPOINT TEST B: THE LF POWER WINDOW IS INOPERATIVE NOTE: The LF door power window motor is not on the multiplex link. NOTE: A new LF door power window motor will be in proportional up/down mode until initialized. Refer to Door Window Motor Initialization in this section. NOTE: The LF door power window motor must be reinitialized whenever: the motor is removed from the window regulator drum housing, a new motor is installed, a new window regulator is installed, a new window glass is installed, a new top run is installed and any operation where grease or lubricants are applied to the window system. CHECK THE POWER TO THE WINDOW MOTOR Ignition OFF. Disconnect: LF Door Power Window Motor C518. Measure the voltage between LF door power window motor C518-7, circuit 1001 (WH/YE) harness side and ground. B2 GO to B2. REPAIR circuit 1001 (WH/YE) for an open. REINITIALIZE the LF power window motor. REFER to Door Window Motor Initialization in this section. TEST the Is the voltage greater than 10 volts? system for normal operation. CHECK THE LF WINDOW MOTOR DELAYED ACCESSORY FEED Ignition ON.

501-11-14 Glass, Frames and Mechanisms 501-11-14 B2 PINPOINT TEST B: THE LF POWER WINDOW IS INOPERATIVE CHECK THE LF WINDOW MOTOR DELAYED ACCESSORY FEED Measure the voltage between LF door power window motor C518-2, circuit 400 (LB/BK) harness side and ground. B3 GO to B3. REPAIR circuit 400 (LB/BK) for an open. REINITIALIZE the LF door power window motor. REFER to Door Window Motor Initialization in this section. TEST the Is the voltage greater than 10 volts? system for normal operation. CHECK THE LF MOTOR GROUNDS Ignition OFF. Measure the resistance between LF door power window motor C518-5, circuit 1203 (BK/LB) or circuit 875 (BK/LB) and C518-8, circuit 1205 (BK) or circuit 57 (BK) harness side and ground. B4 GO to B4. REPAIR circuit 1203 (BK/LB)/875 (BK/LB) or circuit 1205 (BK)/57 (BK) for an open. REINITIALIZE the LF door power window motor. REFER to Door Window Motor Initialization in this section. TEST the Are the resistances less than 5 ohms? system for normal operation. CHECK THE FRONT WINDOW SWITCH-TO-LF MOTOR FEEDS Disconnect: Front Power Window Control Switch C3193a.

501-11-15 Glass, Frames and Mechanisms 501-11-15 B4 PINPOINT TEST B: THE LF POWER WINDOW IS INOPERATIVE CHECK THE FRONT WINDOW SWITCH-TO-LF MOTOR FEEDS Measure the resistance between LF door power window motor C518-3, circuit 992 (WH/BK) and front power window control switch C3193a-3, circuit 992 (WH/BK); C518-4, circuit 991 (TN/LB) and C3193a-2, circuit 991 (TN/LB); C518-6, circuit 777 (YE), circuit 2018 (LB/OG) or circuit 2018 (OG/YE) and C3193a-1, circuit 777 (YE), circuit 2018 (LB/OG) or circuit 2018 (OG/YE) harness side. B5 GO to B5. REPAIR circuit 992 (WH/BK), circuit 991 (TN/LB) or circuit 777 (YE), circuit 2018 (LB/OG) or circuit 2018 (OG/YE) for an open. REINITIALIZE the LF door power window motor. REFER to Door Window Motor Initialization in this section. TEST Are the resistances less than 5 ohms? the system for normal operation. CHECK THE FRONT WINDOW CONTROL SWITCH Carry out the power window control switch component test. Refer to Wiring Diagrams Cell 149 for component testing. INSTALL a new LF door power window Did the window control switch pass the component test? motor. REFER to Front Door Window Regulator Motor in this section. REINITIALIZE the LF door power window motor. REFER to Door Window Motor Initialization in this section. TEST the system for normal operation. INSTALL a new front power window control switch. REFER to Window Control Switch in this section. TEST the system for normal operation. Pinpoint Test C: The RF Power Window Is Possible Causes Inoperative Inoperative RF door power window motor rmal Operation Inoperative front power window control switch Under normal operation when the front power Open in circuit 313 (WH/YE) or circuit 314 window control switch is operated in the UP (TN/LB) position the RF motor receives power through circuit 313 (WH/YE) and ground through circuit 314 (TN/LB). When the front power window control switch is operated in the DOWN position the RF motor receives power through circuit 314 (TN/LB) and ground through circuit 313 (WH/YE). C1 PINPOINT TEST C: THE RF POWER WINDOW IS INOPERATIVE CHECK THE RF POWER WINDOW MOTOR Disconnect: Window Control Switch C3193a and 3193b. Ignition ON.

501-11-16 Glass, Frames and Mechanisms 501-11-16 C1 PINPOINT TEST C: THE RF POWER WINDOW IS INOPERATIVE CHECK THE RF POWER WINDOW MOTOR Connect a fused jumper wire between front power window control switch C3193b-3, circuit 313 (WH/YE) and C3193b-6, circuit 400 (LB/BK) and connect a second fused jumper wire between C3193b-4, circuit 1205 (BK) or circuit 57 (BK) and C3193b-2, circuit 314 (TN/LB). The window should operate in the up direction. Connect a fused jumper wire between front power window control switch C3193b-2, circuit 314 (TN/LB) and C3193b-6, circuit 400 (LB/BK) and connect a second fused jumper wire between C3193b-4, circuit 1205 (BK) or circuit 57 (BK) and C3193b-3, circuit 313 (WH/YE). The window should operate in the down direction. C2 INSTALL a new front power window control switch. REFER to Window Control Switch in this section. TEST the system for normal operation. Does the window operate correctly? GO to C2. CHECK CIRCUITS 313 (WH/YE) AND 314 (TN/LB) FOR AN OPEN Ignition OFF. Disconnect: RF Window Motor C608.

501-11-17 Glass, Frames and Mechanisms 501-11-17 C2 PINPOINT TEST C: THE RF POWER WINDOW IS INOPERATIVE CHECK CIRCUITS 313 (WH/YE) AND 314 (TN/LB) FOR AN OPEN Measure the resistance between front power window control switch C3193b-3, circuit 313 (WH/YE) and between and RF door power window motor C608-1, circuit 313 (WH/YE) harness side. Measure the resistance between front power window control switch C3193b-2, circuit 314 (TN/LB) and between and RF door power window motor C608-2, circuit 314 (TN/LB) harness side. INSTALL a new RF window regulator motor. REFER to Front Door Window Regulator Motor. TEST the system for normal operation. REPAIR circuit 313 (WH/YE) or circuit 314 (TN/LB) for an open. TEST the system for Are the resistances less than 5 ohms? normal operation. Pinpoint Test D: The LR Or RR Power Window Is Inoperative rmal Operation NOTE: Circuits 884 (YE/BK) and 885 (YE/LB) change to 881 (BN) and 882 (BN/YE) in the LR door jumper harness. Under normal operation the rear power window control switches receive power from the front power window control switch through circuit 170 (RD/LB) when the LOCK OUT feature is not active. When the rear windows are operated using the front power window control switch to the UP position, power is sent through circuit 317 (GY/OG) for LR/ 319 (YE/BK) for RR and ground through 316 (YE/LB) for LR/ 320 (RD/BK) for RR. When the rear windows are operated using the front power window control switch to the DOWN position, power is sent through circuit 316 (YE/LB) for LR/ 320 (RD/BK) for RR and ground through 317 (GY/OG) for LR/ 319 (YE/BK) for RR.

501-11-18 Glass, Frames and Mechanisms 501-11-18 When the rear windows are operated using the rear power window control switch to the UP position power is sent to the rear window motor through circuit 884 (YE/BK) LR/ 881 (BN) for RR and ground through 885 (YE/LB) for LR/ 882 (BN/YE) for RR. When the rear windows are operated using the rear window control switch to the DOWN position power is sent to the rear window motor through circuit 885 (YE/LB) for LR/ 882 (BN/YE) for RR and ground through 884 (YE/BK) for LR/ 881 (BN) for RR. Possible Causes Inoperative front power window control switch Inoperative rear door power window motor Inoperative rear power window control switch Open in circuits 170 (RD/LB), 316 (YE/LB), 317 (GY/OG), 319 (YE/BK), 320 (RD/BK), 881 (BN), 882 (BN/YE), 884 (YE/BK) or 885 (YE/LB) D1 PINPOINT TEST D: THE LR OR RR POWER WINDOW IS INOPERATIVE CHECK THE VOLTAGE TO THE LR OR RR WINDOW CONTROL SWITCH Disconnect: Inoperative Rear Power Window Control Switch C701/C801. Ignition ON. NOTE: Set the window lock switch to the UNLOCK position. Measure the voltage between the inoperative rear power window connector C701-4/ C801-4, circuit 170 (RD/LB) and ground. D2 GO to D2. REPAIR circuit 170 (RD/LB) for an open. Is the voltage greater than 10 volts? TEST the system for normal operation. CHECK THE GROUNDS TO THE INOPERATIVE REAR WINDOW CONTROL SWITCH Ignition OFF.

501-11-19 Glass, Frames and Mechanisms 501-11-19 D2 PINPOINT TEST D: THE LR OR RR POWER WINDOW IS INOPERATIVE CHECK THE GROUNDS TO THE INOPERATIVE REAR WINDOW CONTROL SWITCH Measure the resistance between ground and inoperative rear power window control switch C701/C801: C801-2, circuit 320 (RD/BK) for RR/ C701-2, circuit 316 (YE/LB) for LR. C701-8, circuit 319 (YE/BK) for RR/ C701-8, circuit 317 (GY/OG) for LR. D3 GO to D4. Are the resistances less than 5 ohms? GO to D3. CHECK THE CIRCUITS TO THE INOPERATIVE REAR WINDOW CONTROL SWITCH FOR AN OPEN Ignition OFF. Disconnect: Front Power Window Control Switch C3193a/C3193b. Measure the resistance between front power window control switch C3193a-4, circuit 316 (YE/LB) and LR power window control switch C701-2, circuit 316 (YE/LB) or, between front power window control switch C3193b-5, circuit 320 (RD/BK) and RR power window control switch C801-2, circuit 320 (RD/BK) harness side.

501-11-20 Glass, Frames and Mechanisms 501-11-20 D3 PINPOINT TEST D: THE LR OR RR POWER WINDOW IS INOPERATIVE CHECK THE CIRCUITS TO THE INOPERATIVE REAR WINDOW CONTROL SWITCH FOR AN OPEN Measure the resistance between front power window control switch C3193a-8, circuit 317 (GY/OG) and LR power window control switch C701-8, circuit 317 (GY/OG) or, between front power window control switch C3193b-1, circuit 319 (YE/BK) and RR power window control switch C801-8, circuit 319 (YE/BK) harness side. D4 INSTALL a new front power window control switch. REFER to Window Control Switch in this section. TEST the system for normal operation. REPAIR the circuit(s) for an open. TEST Are the resistances less than 5 ohms? the system for normal operation. CHECK THE INOPERATIVE WINDOW CONTROL SWITCH Connect: Front Power Window Control Switch C3193a/C3193b. Ignition ON. Connect a fused jumper wire between inoperative power window control switch C701-8/ C801-8, circuit 319 (YE/BK) for RR/ circuit 317 (GY/OG) for LR and C701-7/ C801-7, circuit 881 (BN) for RR/ circuit 884 (YE/BK) for LR; connect a second fused jumper wire between C701-4/ C801-4, circuit 170 (RD/LB) and C701-3/ C801-3, circuit 882 (BN/YE) for RR/ circuit 885 (YE/LB) for LR harness side. The window should operate in the down direction.

501-11-21 Glass, Frames and Mechanisms 501-11-21 D4 PINPOINT TEST D: THE LR OR RR POWER WINDOW IS INOPERATIVE CHECK THE INOPERATIVE WINDOW CONTROL SWITCH Connect a fused jumper wire between inoperative power window control switch C701-2/ C801-2, circuit 320 (RD/BK) for RR/ circuit 316 (YE/LB) for LR and C701-3/ C801-3, circuit 882 (BN/YE) for RR/ circuit 885 (YE/LB) for LR; connect a second fused jumper wire between C701-4/ C801-4, circuit 170 (RD/LB) and C701-7/ C801-7, circuit 881 (BN) for RR/ circuit 884 (YE/BK) for LR harness side. The window should operate in the upward direction. D5 INSTALL a new rear power window control switch. TEST the system for normal operation. Does the window operate correctly? GO to D5. CHECK THE POWER WINDOW MOTOR CIRCUITS Ignition OFF. Disconnect: Inoperative Rear Door Power Window Motor C703/C803. Measure the resistance between inoperative rear power window control switch C701-7/ C801-7, circuit 881 (BN) for RR/ circuit 884 (YE/BK) for LR, and inoperative rear door power window motor C703-1/ C803-1, circuit 881 (BN) for RR and LR harness side.

501-11-22 Glass, Frames and Mechanisms 501-11-22 D5 PINPOINT TEST D: THE LR OR RR POWER WINDOW IS INOPERATIVE CHECK THE POWER WINDOW MOTOR CIRCUITS Measure the resistance between inoperative rear power window control switch C701-3/ C801-3, circuit 882 (BN/YE) for RR/ circuit 885 (YE/LB) for LR, and inoperative rear door power window motor C703-2/ C803-2, circuit 882 (BN/YE) for RR and LR harness side. INSTALL a new rear window motor. TEST the system for normal operation. REPAIR the circuit(s) for an open. TEST Are the resistances less than 5 ohms? the system for normal operation. Pinpoint Test E: The One-Touch Up/Down Feature Is Inoperative rmal Operation NOTE: The LF door power window motor is not on the multiplex link. NOTE: A new LF door power window motor will be in proportional up/down mode until initialized. Refer to Door Window Motor Initialization in this section. NOTE: The LF door power window motor must be reinitialized whenever: the motor is removed from the window regulator drum housing, a new motor is installed, a new window regulator is installed, a new window glass is installed, a new top run is installed, and when carrying out any operation where grease or lubricants are applied to the window system. Under normal operation the front power window control switch receives power from the delay accessory relay through circuit 400 (LB/BK) and is grounded to chassis through circuit 1205 (BK). When the front window control switch is operated in the UP position the LF motor receives power through circuit 992 (WH/BK). When the front window control switch is operated in the DOWN position the LF motor receives power through circuit 991 (TN/LB). When the LF window motor receives a ground signal on circuit 777 (YE), circuit 2018 (LB/OG) or circuit 2018 (OG/YE) the LF window motor will enter one-touch up/down. Possible Causes B+ power lost during LF window operation Inoperative LF door power window motor Inoperative front power window control switch (auto contact only) LF motor not initialized Open in circuits 400 (LB/BK), 1001 (WH/YE), 777 (YE) or circuit 2018 (LB/OG) or circuit 2018 (OG/YE), 991 (TN/LB), 992 (WH/BK), 1203 (BK/LB)/875 (BK/LB) or 1205 (BK)/57 (BK)

501-11-23 Glass, Frames and Mechanisms 501-11-23 E1 E2 E3 E4 PINPOINT TEST E: THE ONE-TOUCH UP/DOWN FEATURE IS INOPERATIVE NOTE: The LF door power window motor is not on the multiplex link. NOTE: A new LF door power window motor will be in proportional up/down mode until initialized. Refer to Door Window Motor Initialization in this section. NOTE: The LF door power window motor must be reinitialized whenever: the motor is removed from the window regulator drum housing, a new motor is installed, a new window regulator is installed, a new window glass is installed, a new top run is installed and when carrying out any operation in where grease or lubricants are applied to the window system. CHECK FOR B+ POWER LOSS DURING LF WINDOW OPERATION Verify if B+ power was lost during LF window operation. Was B+ power lost while LF window was in operation? RAISE the LF window to the FULL CLOSED position. MAKE SURE the window glass stalls into the upper header seal. rmal functionality should resume. TEST the system for normal operation. GO to E2. INITIALIZE THE LF MOTOR Carry out the LF window motor initialization procedure. Refer to Door Window Motor Initialization in this section. Repair is complete. TEST the system for Are the one-touch up/down functions operating correctly? normal operation. GO to E3. CHECK THE FRONT WINDOW CONTROL SWITCH Carry out the front window switch component test. Refer to Wiring Diagrams Cell 149 for component testing. GO to E4. Did the front window switch pass the component test? INSTALL a new front window control switch. REFER to Window Control Switch in this section. TEST the system for normal operation. CHECK THE FRONT WINDOW SWITCH TO LF MOTOR FEEDS Ignition OFF. Disconnect: Front Power Window Control Switch C3193a. Disconnect: LF Door Power Window Motor C518. Measure the resistance between LF door power window motor C518-3, circuit 992 (WH/BK) and front power window control switch C3193a-3, circuit 992 (WH/BK); C518-4, circuit 991 (TN/LB) and C3193a-2, circuit 991 (TN/LB); C518-6, circuit 777 (YE), circuit 2018 (LB/OG) or circuit 2018 (OG/YE) and C3193a-1, circuit 777 (YE), circuit 2018 (LB/OG) or circuit 2018 (OG/YE) harness side. E5 GO to E5. REPAIR circuit 992 (WH/BK), circuit 991 (TN/LB) or circuit 777 (YE), circuit 2018 (LB/OG) or circuit 2018 (OG/YE) for an open. REINITIALIZE the LF door power window motor. REFER to Door Window Motor Initialization in this section. TEST Are the resistances less than 5 ohms? the system for normal operation. CHECK FOR INTERMITTENT GROUND CONNECTIONS Ignition OFF.

501-11-24 Glass, Frames and Mechanisms 501-11-24 E5 PINPOINT TEST E: THE ONE-TOUCH UP/DOWN FEATURE IS INOPERATIVE CHECK FOR INTERMITTENT GROUND CONNECTIONS Measure the resistance between LF door power window motor C518-5, circuit 1203 (BK/LB) or circuit 875 (BK/LB) and C518-8, circuit 1205 (BK) or circuit 57 (BK) harness side and ground. E6 GO to E6. REPAIR circuit 1203 (BK/LB)/875 (BK/LB) or circuit 1205 (BK)/57 (BK) for an open. REINITIALIZE the LF door power window motor. REFER to Door Window Motor Wiggle the harness while measuring the resistances. Initialization in this section. TEST the Are the resistances less than 5 ohms? system for normal operation. CHECK FOR INTERMITTENT POWER CONNECTIONS Ignition ON. Measure the voltage between LF door power window motor C518-7, circuit 1001 (WH/YE) and C518-2, circuit 400 (LB/BK) harness side and ground. INSTALL a new LF door power window motor. REFER to Front Door Window Regulator Motor in this section. REINITIALIZE the LF power window motor. REFER to Door Window Motor Initialization in this section. TEST the system for normal operation. REPAIR circuit 1001 (WH/YE) or circuit 400 (LB/BK) for an open. REINITIALIZE the LF door power window motor. REFER to Door Window Motor Initialization in this Wiggle the harness while measuring the voltages. section. TEST the system for normal Are the voltages greater than 10 volts? operation.

501-11-25 Glass, Frames and Mechanisms 501-11-25 Pinpoint Test F: The Defrost System Is Inoperative rmal Operation Under normal operation the heated backlight power relay receives power from circuit 185 (BK) and 326 (WH/VT). When the rear window defrost switch is depressed on the dual automatic temperature control (DATC) control unit, a ground signal is sent to the instrument cluster module (ICM) through circut 688 (GY/LB). When the ICM receives ground through circuit 688 (GY/LB), the ICM grounds circuit 1009 (DG/VT) to activate the heated backlight power relay. Power is then sent to the rear window defrost grid through circuit 186 (BN/LB) from the heated backlight power relay. The rear window defrost grid then receives ground through circuit 1205 (BK) to chassis ground. Possible Causes Inoperative ICM Inoperative DATC Inoperative heated backlight power relay Open in circuits 185 (BK), 186 (BN/LB), 326 (WH/VT), 688 (GY/LB), 1009 (DG/VT) or 1205 (BK) F1 PINPOINT TEST F: THE DEFROST SYSTEM IS INOPERATIVE CHECK THE POWER TO THE HEATED BACKLIGHT RELAY Disconnect: Heated Backlight Power Relay C402a. Ignition ON. Measure the voltage between rear window defrost relay socket pin 85 and pin 30 harness side and ground. F2 GO to F2. REPAIR the circuit(s). TEST the system Is the voltage greater than 10 volts? for normal operation. CHECK THE ICM OUTPUT Turn ON the rear window defrost.

501-11-26 Glass, Frames and Mechanisms 501-11-26 F2 PINPOINT TEST F: THE DEFROST SYSTEM IS INOPERATIVE CHECK THE ICM OUTPUT Measure the voltage between rear window defrost relay socket pin 85 and pin 86 harness side. F3 F4 GO to F3. Is the voltage greater than 10 volts? GO to F6. CHECK THE HEATED BACKLIGHT RELAY Carry out the heated backlight relay component test. Refer to Wiring Diagrams Cell 149 for component testing. GO to F4. Did the heated backlight relay pass the component test? INSTALL a new heated backlight relay. TEST the system for normal operation. CHECK THE REAR WINDOW DEFROST GRID VOLTAGE Connect: Heated Backlight Power Relay C402a. Disconnect: Heated Backlight Power Relay C402a. Ignition ON. Turn rear window defrost on. Measure the voltage between the heated backlight power relay C402a, circuit 186 (BR/LB) and ground. F5 GO to F5. REPAIR the circuit. TEST the system for Is the voltage greater than 10 volts? normal operation. CHECK THE REAR WINDOW DEFROST GRID GROUND Ignition OFF. Disconnect: Rear Window Defrost Grid Ground C402b.

501-11-27 Glass, Frames and Mechanisms 501-11-27 F5 PINPOINT TEST F: THE DEFROST SYSTEM IS INOPERATIVE CHECK THE REAR WINDOW DEFROST GRID GROUND Measure the resistance between rear window defrost grid ground C402b, circuit 1205 (BK) and ground. F6 F7 REPAIR the rear window defrost grid or INSTALL a new liftgate glass. TEST the system for normal operation. REPAIR the circuit. TEST the system for Is the resistance less than 5 ohms? normal operation. CHECK THE REAR WINDOW DEFROST SWITCH Enter the following diagnostic mode on the scan tool: Instrument Cluster Module (ICM) Rear Window Defrost PID. Monitor the ICM rear window defrost PID while turning the rear window defrost ON. GO to F8. Does the PID match the expected state of the rear window defrost? GO to F7. CHECK CIRCUIT 688 (GY/LB) FOR AN OPEN Disconnect: ICM C220a. Disconnect: DATC Module C228a. Measure the resistance between DATC C228a-12, circuit 688 (GY/LB) and ICM C220a-15, circuit 688 (GY/LB), harness side. F8 INSTALL a new DATC module. REFER to Section 412-01. TEST the system for normal operation. REPAIR the circuit. TEST the system for Is the resistance less than 5 ohms? normal operation. CHECK CIRCUIT 1009 (OG/YE) FOR AN OPEN Disconnect: Instrument Cluster Module (ICM) C220a.

501-11-28 Glass, Frames and Mechanisms 501-11-28 F8 PINPOINT TEST F: THE DEFROST SYSTEM IS INOPERATIVE CHECK CIRCUIT 1009 (OG/YE) FOR AN OPEN Measure the resistance between instrument cluster module (ICM) C220a-4, circuit 1009 (OG/YE) and heated backlight power relay socket pin 86, circuit 1009 (OG/YE) harness side. INSTALL a new ICM. REFER to Section 413-01. TEST the system for normal operation. REPAIR the circuit. TEST the system for Is the resistance less than 5 ohms? normal operation. Pinpoint Test G: The Defrost System Will t Shut Off Automatically rmal Operation Under normal operation the heated backlight power relay receives power from circuit 185 (BK) and 326 (WH/VT). When the rear window defrost switch is depressed on the dual automatic temperature control (DATC) control unit, a ground signal is sent to the instrument cluster module (ICM) through circuit 688 (GY/LB). When the ICM receives ground through circuit 688 (GY/LB), the ICM grounds circuit 1009 (OG/YE) to activate the heated backlight power relay. Power is then sent to the rear window defrost grid through circuit 186 (BN/LB) from the heated backlight power relay. The rear window defrost grid then receives ground through circuit 1205 (BK) to chassis ground. Possible Causes Inoperative ICM Inoperative heated backlight power relay Open in circuit 186 (BN/LB) Short to ground in circuit 1009 (OG/YE) or circuit 688 (GY/LB) G1 G2 PINPOINT TEST G: THE DEFROST SYSTEM WILL NOT SHUT OFF AUTOMATICALLY CHECK CIRCUIT 186 (BN/LB) FOR A SHORT TO VOLTAGE Disconnect: Heated Backlight Power Relay C402a. Ignition ON. REPAIR circuit 186 (BN/LB) for a short to Is the rear window defrost ON? voltage. TEST the system for normal operation. GO to G2. CHECK THE REAR WINDOW DEFROST RELAY Ignition OFF. Disconnect: Rear Window Defrost Relay. GO to G3. Carry out the rear window defrost relay component test. Refer to Wiring Diagrams Cell 149 for component testing. INSTALL a new rear window defrost relay. Is the rear window defrost relay OK? TEST the system for normal operation.

501-11-29 Glass, Frames and Mechanisms 501-11-29 G3 PINPOINT TEST G: THE DEFROST SYSTEM WILL NOT SHUT OFF AUTOMATICALLY CHECK THE REAR WINDOW DEFROST RELAY Ignition OFF. Measure the resistance between rear window defrost relay socket pin 86, circuit 1009 (OG/YE) harness side and ground. G4 GO to G5. Is the resistance greater than 10,000 ohms? GO to G4. CHECK CIRCUIT 1009 (OG/YE) FOR A SHORT TO GROUND Disconnect: ICM C220a. Measure the resistance between rear window defrost relay socket pin 86, circuit 1009 (OG/YE) harness side and ground. G5 INSTALL a new ICM. REFER to Section 413-01. TEST the system for normal operation. REPAIR the circuit. TEST the system for Is the resistance greater than 10,000 ohms? normal operation. CHECK CIRCUIT 688 (GY/LB) FOR A SHORT TO GROUND Disconnect: DATC Module C228a. Measure the resistance between DATC module C228a-12, circuit 688 (GY/LB) harness side and ground. INSTALL a new DATC module. REFER to Section 412-01. REPAIR the circuit. TEST the system for Is the resistance greater than 10,000 ohms? normal operation.

501-11-30 Glass, Frames and Mechanisms 501-11-30 G6 PINPOINT TEST G: THE DEFROST SYSTEM WILL NOT SHUT OFF AUTOMATICALLY CHECK THE INSTRUMENT CLUSTER MODULE (ICM) Disconnect: Instrument Cluster Module (ICM) C220a. Measure the resistance between heated backlight power relay socket pin 86, circuit 1009 (OG/YE) harness side and ground. INSTALL a new ICM. REFER to Section 413-01. TEST the system for normal operation. REPAIR circuit 1009 (OG/YE) for a short to ground. TEST the system for normal Is the resistance greater than 10,000 ohms? operation. Pinpoint Test H: The Delayed Accessory Is Possible Causes Inoperative Faulty CJB rmal Operation Inoperative ICM Under normal operation the delay accessory relay Open in circuit 1004 (LB/RD) or circuit 400 receives power from the central junction box (CJB). (LB/BK) The instrument cluster module (ICM) grounds the Inoperative delay accessory relay delay accessory relay through circuit 1004 (LB/RD) and then the accessory delay relay provides power to the front power window control switch through circuit 400 (LB/BK). H1 H2 PINPOINT TEST H: THE DELAYED ACCESSORY IS INOPERATIVE CHECK THE DELAYED ACCESSORY RELAY Disconnect: Delayed Accessory Relay. Carry out the delayed accessory relay component test. Refer to GO to H2. wiring Diagrams Cell 149 for schematic and connector information. INSTALL a new delayed accessory relay. Did the delayed accessory relay pass the component test? TEST the system for normal operation. CHECK THE POWER TO THE RELAY COIL Ignition ON. Measure the voltage between ground and delayed accessory relay socket pin 85.

501-11-31 Glass, Frames and Mechanisms 501-11-31 H2 PINPOINT TEST H: THE DELAYED ACCESSORY IS INOPERATIVE CHECK THE POWER TO THE RELAY COIL H3 H4 GO to H3. REPAIR circuit 38 (BK/OG), central junction box (CJB). TEST the system for Is the voltage greater than 10 volts? normal operation. CHECK THE POWER TO THE RELAY Measure the voltage between accessory delay relay socket pin 30 and ground. REPAIR circuit 645 (WH/LB), CJB. TEST Is the voltage greater than 10 volts? the system for normal operation. GO to H4. CHECK CIRCUIT 1004 (LB/RD) FOR AN OPEN Ignition OFF. Disconnect: Instrument Cluster Module (ICM) C220a. Measure the resistance between accessory delay relay socket pin 86, and ICM C220a-5, circuit 1004 (LB/RD). INSTALL a new ICM. REFER to Section 413-01. TEST the system for normal operation. REPAIR circuit 1004 (LB/RD) for an open. Is the resistance less than 5 ohms? TEST the system for normal operation.