_f. 1 INTRODUCTION This booklet contains Wiring Diagrams for 19S0 vehicles listed in the contents below. All diagrams contained in this booklet are based on the latest product information available at the time of publication approval. The manufacturer reserves the right to make product changes at any time. Wire sizes in this booklet are metric. The following table shows metric to AWG size conversions. WIRE SIZE CONVERSION TABLE METRIC SIZE AWG SIZE (mm)2.22.5.8 1 2 3 5 8 13 19 32 24 20 18 16 14 12 10 8 6 4 2 I CONTENTS VEHICLE CAB, ENGINE & CHASSIS WIRING DIAGRAM C, K-I0 thru 35 A-I, 2, 3, 4, 5, 6 G-I0 thru 35... B-1, 2, 3, 4 P-I0 thru 35.. C-l, 2 C, O-SO... 0-1, 2, 3
ELECTRICAL CIRCUIT IDENTIFICATION Ciluit 2 Red 3 Pink 4 5 6 7 8 9 10 11 Light Green 12 13 14 Light Blue 15 16 17 18 19 20 Light Blue 21 Pink 22 24 Light Green 25 26 27 28 29 30 Pink 31 32 33-34 35 36 Light Green 37 Light Green 38 Name Feed, Battery - Un fused Feed, Ign. Sw. "On & Crank", Unfused Feed, Ign. Sw. "Accsy & On", Unfused Neutral Safety Start Sw. or Start Relay Feed Starter Solenoid Feed Primary Ignition Resistance By-Pass Instrument and Panel Lights ( No. 44 Cir.) Tail, License, Park and Side II/Iarker Lamp Feed Dimmer Sw. Feed Headlamp Feed, Hi-Beam Headlamp Feed, Lo-Beam Front Parking Lamps LH. Indicator and Front Directional Lamps R.H. Indicator and Front Directional Lamps Directional Signal Sw., Feed From Flasher Directional Signal Sw., Feed From Stop Sw. Stop and Directional Lamp or Directional Lamp Only - Rear LH. Stop and Directional Lamp or Directional Lamp Only Rear R.H. Stop Lamp (Only) Spot Light Direct Ground - Trailer Back Up Lamp Feed Feed, Voltage Regulator Field (F) (Gen/Reg.) Traffic Hazard Sw., Feed From Hazard Flasher Ground, Horn Sw. Horn Feed Fuel Gauge to k Unit Oil Pressure, Engine Map Light Feed Warning Light Brake Fog or Drive Lamp Ground, Eng. Coolant Temp. Sw. or ECM (Hot) Ground, Eng. Temp. Sw. (Cold) Ground, Eng. Metal Temp. Sw. (Hot) Flasher Feed 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 '58 59 60 61 62 63 64 65 66 67 68 69 70 Pink- - Light Green - Light Green Light Green Light Blue - Pink Name Feed, Ign. Sw. "On and Crank" - Feed, Battery - Feed, Ign. Sw. "Accsy and On" Feed, AIC Auto Relay Radio Feed I.P. and Lights Feed (Usually Light Sw. to Fuse) Marker and Clearance Lamps (Trailers) Rear Seat Speaker Feed From Single Radio or Right Stereo Auxiliary (Trailer) Tail Lp. - Headlamp Sw. "On" or Dir. Signal and Stop - Headlamp Sw. "Off" Rear L.H. Tail Lp. - Headlamp Sw. "On" or Dir. Signal and Stop - Headlamp Sw. "Off" Rear R.H. Feed, Ign. Sw. "On" Blower Resistor Feed - Low Feed, Blow Sw. "Hi" or Selector Sw. "Max Cold" Valve Release Solenoid to Control Box Control to Shield Kick Down Solenoid Feed Amplifier to Transducer LH. Cornering Lamp Feed R.H. Cornering Lamp Feed Compressor Feed Feed, Battery, Breaker Protected Ground, Resistive, Auto AIC Amb. Sensor Ground, Resistive, Auto AIC Feed Back Pot Feed, Blower Sw. "Medium 1" Blower Sw. Feed From AIC Selector Sw. Blower Motor Feed Feed, AIC Selector Sw. (Comp. Ct.) Feed, AIC Freon Press, Cut Out Sw. Ground, Resistive, Low Coolant Probe Ground Low Coolant Module Feed, Relay, Ign. Sw.
,.. Ji I';;; r:}tr ELECTRICAL CIRCUIT IDENTIFICATION (Cont'd) Name 71 Ground, A/C Selector Sw. "Def" 72 Light Blue Feed, Blower Sw. "Medium 2" 73 - Feed, Blower Sw. "Medium 3" 74 Light Green Feed to Throttle Switch 75 Feed, Ign. Sw. "On and Crank" - 76 Pink Feed, Ign. Sw. 78 Light Blue Electric Choke Feed 80 Light Green Ground Key Warning Buzzer 81 Nat. Electric Remote Mirror, Right 82 Light Blue Electric Remote Mirror, Left 83 Feed, Cruise Engage Sw. "Retard" 84 Feed, Cruise Engage Sw. "Engage" 85 Ground, Cruise Indicator Regulator 86 Feed, Cruise Brake Release Sw. 88 Electric Remote Mirror, Up 89 Light Green Electric Remote Mirror, Down 90 Pink Feed, Cutout Sw., Cir. Brkr. Protected 91 Windshield Wiper Low 92 Windshield Wiper - Hi 93 Windshield Wiper Motor Feed 94 Pink Windshield Washer Sw. to Washer 95 Ground, Pulse Wiper Sw. 96 Feed, Pulse Wiper Rheostat Sw. 99 - Windshield Washer Low Fluid 101 Resistor Output to Blower Relay 102 SL Alternator - Regulator Sensing 105 Ammeter - Generator 106 Ammeter - Battery 107 Over Speed Warning Light 111 Ground, Anti Ski Low Air Sw. 112 Telltale Temperature Gauge (Hot) 115 Light Blue Speaker Return, RT rr Stereo 116 Speaker Return, LF rr Stereo 117 Speaker Return, RT Frt. Stereo 118 Sp.k.RMur~LFhLShreo 119 Generator (Alternator) to Regulator 120 Electric Fuel Pump Feed 121 Tachometer to Coil 125 Door Jamb Switch 126 Seat Back Lock Feed 130 - Generator (Alternator) Ext. Resist. 2 Ohms/Foot 131 132 133 135 139 140 141 142 143 144 145 146 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 -Pink Pink Pink. - - Light Green - Light Green Name Generator (Alternator) Ext. Resist. 1 Ohm/Foot Ground, Fuel Economy Sw., Amber Telltale Ground, Fuel Economy Sw., Grn. Telltale Ground, Resistive, Temp. Gauge Sensor Feed, Ign. Sw. "On and Crank" - Feed, Battery Feed, Ign. Sw., "Accsy and On" Rr Compartment Lid Lock Release Feed Radio Sw. "On" Feed to Pwr Ant Sw. Feed, Pwr Ant Up, Relay Ground, Trunk Release Tell Tale Ground - Direct Ground Direct Ground - Direct Ground - Direct Ground - Direct Ground Direct Ground - Sw. Body Interior Lamps - such as Dome, Courtesy, Map, Warning, etc. Ground - Sw. Body Interior Lamps - such as Dome, Courtesy, Map, Warning etc. Ground - Sw. Body Interior Lamps - such as Dome, Courtesy, Map, Warning etc. Ground, Key Warning Buzzer Power Antenna Down Power Antenna Up Power Top Up Power Top Down Window Control LF Up Window Control LF Down Window Contro I R F Up Window Control R F Down Window Control LR Up Window Control LR Down Window Control R R Up Window Control R R Down Vent Control LF Close Vent Control LF Open Vent Control RF Close
ELECTRICAL CIRCUIT IDENTIFICATION (Cont'd) 175 176 177 178 179 180 Name Vent Control R F Open Power Seat Fore Power Seat Aft or Recline Power Seat 6-Way Fore and Aft Power Seat 6-Way Solenoid - Rear - Up and Down Light Green Power Seat 6-Way Solenoid Front - Up and Down 181 Light Blue Power - Solenoid - Fore and Aft 182 Power Seat - 6-Way Aft and Down 183 Light Blue Tailgate or Center Partition Window Up 184 - Tailgate or Center Partition Window Down 185 186 187 188 189 Light Blue Vent Control LR Open Vent Control LR Close Vent Control RR Open Vent Control R R Close Power Seat - 4-Way - Fore and Down 190 Power Seat 4-Way - Aft and Up 191 Light Green Power Seat - 4-Way Solenoid Up and Down 192 Defogger - Hi or Single Speed 193 - Defogger - Low Speed - 0.38 Ohms per foot 194 Electric Door Lock - Unlock 195 Light Blue Electric Door Lock - Lock 198 Light Green Ground, Resistive, AIC In-Car Sensor 199 Rear Seat Speaker - Feed from Radio Left Stereo 200 Light Green Front Speaker - Feed From Radio Single or Right Stereo 201 Front Speaker - Feed from Radio Left Stereo 202 Ground, Compressor over Heat Sw. 203 Light Blue Rear AIC Potentiometer Feed 204 Thermal Limiter Feed 205 - Seat Belt Seat Sensor to Belt Retractor (Grd) 206 Neutral Start Sw. to Buzzer and Lamp 207 Seat Sensor to Neutral Start Sw. (Lamp and Buzzer Grd) 208 Sw. Ground (TCS) 209 Park Brake Warn ing Lamp 210 Power Seat - 6-Way - Fore and Down - "A" Body 211 Power Seat - 6-Way - Aft and Up - "A" Body 212 - Stripe LH Seat Sensor 213 Center Seat Sensor RH Seat Sensor LH Sw. 214 215 216 217 218 219 220 221 222 223 - - - Light Green- Light Blue 224 Light Green 225 226 227 228 229 Pink 230 Pink 231 232 233 234 235 236 237 238 239 240 241 Pink- 242 243-244 245 246 247 Name Center Buckle Sw. (Feed) RH Sw. Interlock Relay - Ground (Provided by Electronics) Starter Interlock Starter Feed Starter Interlock Buz and Lp Feed Passenger Initiator Feed, Low Level, I R Passenger Initiator Return, Low Level,IR Sensor Detector Hi Return, Low Level, IR Sensor Detector Lo Feed, Lo Feed. Low Level, I R Warning Lamp Ground I R Warning Lamp Sensor Recorder to Sensor Power Feed Warning Lamp Feed Sensor Detector Hi Feed, Lo LevellR Recorder Power Feed Driver Initiator Feed, IR Driver Initiator Return. IR Hi Level Actuation Passenger (Inactive) IR Feed, Ign. Sw., Unfused Sensor Detector Hi Feed - Hi Level IR Sensor Detector Hi Return - Hi Level IR Feed, Belt Warn Timer Con trolled (Timed 39 Ct.) Seat Belt Warn System-Buzzer Ground to Belt Assy Sw. Feed, Ign. Sw. "On & Crank" - Feed, Battery - Sensor Detector Lo Feed, H,i Level,lR Feed. Throttle Control Spark Valve Feed, Drive Selector Sw. Feed, L T FlO Solenoid Relay Feed. RT F ID Solenoid Relay Feed, ADL Lock Relay Coil Feed, to AIC Shut-Off Relay
ELECTRICAL CIRCUIT IDENTIFICATION (Cont'd) Name 248 Feed, to AIC Compressor Ham Relay 249 Feed. From AIC Ham '250 Feed, Ign. Sw. on. 251 Passenger Initiator Feed 252 Ground. ADL Module Unlock Output 253 Dark Ground. ADL Module Lock Output 254 Light Green Ground. ADL LT Unlock Relay Coil 255 Ground, ADL RT Unlock Relay Coil 256 Ground. Module, Lamp Out Indicator 257 Ground, AIC Press, Sw. 258 Passenger Initiator Return Hi Level. IR 259 IR Crank Start Signal- 6 Cir. 260 Theft Deterrent Hood Sw. 261 Theft Deterrent Alarm Arm 262 Light Green Theft Deterrent Key Door Unlock and Alarm Disarm 263 Light Blue Theft Deterrent Alarm 264 Theft Deterrent Arm Indication 265 - Theft Deterrent Alarm Output 266 Pink Theft Deterrent Alarm Arm Abort 267 Pwr Seat Fore and Up Recliner 268 Pwr Seat Aft and Down Recliner 269 Light Green Pwr Seat Sol Up and Down Recliner 270 - Feed, Amplifier to Potentiometer 271 Ground, Potentiometer 272 Light Green Feed, Poteniometer Rheostat 273 Feed. Hdlp Sw. to Amplifier, Hdlp Sw. 274 Feed. Hdlp Sw. to Amplifier 275 Light Green Feed, Neut Saf Start Sw. "Park" 276 Light Green Recl. Mtr. Feed, Power St. Fwd. 277 L~ght Blue Recl. Mtr. Feed, Power St. Recliner 278 Amplifier to Photocell 279 Headlamp Sw. to Photocell 280 Pink Feed, P.M. Motor Up Cycle (Deck Lid Pull Down) 281 Ground, Relay Coil Down Cycle (Deck Lid Pull Down) 282 Power Seat, Rear Vert Up Motor I'lumber Name 283 Light Blue Power Seat, Rear Vert Down - Motor 284 Light Green Power Seat, Aft Motor 285 Power Seat, Fore Motor 286 Power Seat, Front Vert Up Motor 287 Power Seat, Front Vert Down Motor 288 - Power Seat, Rear Vert Up Relay 289 Light Blue- Power Seat, Rear Vert Down Relay 290 Light Green- Power Seat, Aft Relay 291 Ground, Heated Glass Timer, On Off Sw. 292 Light Blue Feed, Heated Glass Timer. On Off SW.ll 293 - Feed. Heated Glass Timer 294 Door Lock Motor Unlock 295 Door Lock Motor Lock 296 Power Seat, Fore Relay 297 Power Seat, Front Vert Up Relay 298 Power Seat, Front Vert Down Relay 300 Feed, Ign. Sw., "On" - Un fused 318 - Snipe 319 - Relay Activated Left Directional Lamp Relay Activated Right Directional Lamp 339 Pink- Feed, Ign. Sw. On and Crank 340 Feed, Battery 350 Pink Feed, Ign. Sw. "On" - 351 Feed, Inverter to Opera Lamp 352 Opera Lamp to Inverter Return 370 Pink Feed, Avl 383 Light Blue Convert Clutch Release Sw. to Vac. Sw. 384 Light Green Vac. Sw. to Transmission Sw. Sol 385 Hi Vac Sw. to Transmission Sw. Sol 390 Feed to Side Marker and License Lamp Export Only 394 Light Green Ground, L T FlO Remote Handle Sw. 395 Light Blue Ground, RT FlO Remote Handle Sw. 402 Light Green Feed, Electronic Cruise Control Valve 403 Feed, Electronic Cruise Shut-Off Valve 404 Light Green EST Pickup Coil to HEI Module, HiQh
ELECTRICAL CIRCUIT IDENTIFICATION (Cant'd). Name 405 EST Pickup Coil to HEI Module, Low 406 -Green ESC Module to HEI Module, Signal Lead 407 Emergency Signal Lead, ECM to HEI Module 408 - ECM to ESC Bypass 410 ECM to Coolant Temp Sensor 411 Light Blue ECM to Fuel Metering Sol 412 02 Sensor Sig 413 02 Sensor Low 414 Pink 02 Sensor Heater High 415 Light Green ECM to Enrichment Sw. 416 ECM 5V Reference Voltage 417 ECM to Throttle Position Sensor Signal 418 ECM to Adaptive Sw. 419 - ECM to Check Eng Lp 420 ECM to Break Sw. 421 - ECM to Cold Start Program Modifier 422 - ECM to TCC Solenoid 423 EST Signal 424 - EST Bypass 425 Light Blue ECM to ISC-Motor Extend 426 ECM to ISC-Motor Retract 427 Pink ECM to ISC-Sw. 428 - ECM to Canister Purge 429 -Pink ECM to Air Control Solenoid 430 - ECM Ref Pulse High 431 Light Green- 8V Ref Voltage 432 - ECM to Map Sig 433 - ECM to Baro Sig 434 - ECM to Neutral Park Sw 436 ECM to Air Switch Solenoid 437 ECM to Vehicle Speed Sensor 438 Red- ECM to High Gear Switch 439 Pink- Feed Ign. Sw. "On & Crank" 440 Feed, Battery 450 - CLCC ECM Power Grd 451 - Diagnostic Enable 452 Low Level Ground 453 -Red EST Ref Pulse Low 454 - Critical Ground 460 - Feed, Battery Breaker Protected 461 IMC to ECC, Serial Data for MPG or Diagnostics 462 Pink Ground, I MC, Set Ti ming 463 - IMC to Trip Computer Signal, Fuel Flow Data (Injector on Time) 464 - MPG Reset Signal.' 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 496 500 501 502 503 504 505 506 507 508 509 610 611 618 619 666 667 668 - Light Blue Light Green - Pink- -Light Blue Pink- -Pink Light Green- Red Green - - Light Blue - Light Blue - Green- Name Feed, Electric Fuel. IMC to Trip Computer, RPM Data Low Side of Injector "A" IMC Low Side of Injector "B" IMC Map Return, Low Level Ground Coolant Temp and Manifold Temp Return, Low Level Grd Baro Reference Voltage, 5V Manifold Air Temp Sig Baro Return, Low Level Ground Throttle Position Sensor Excitation, 5V Map Reference Voltage, 5V Throttle Position Sensor Return, Low Level Grd MPG Request Signal Fuel Economy Indicator (Grn), IMC Fuel Economy Indicator (Amber), IMC Feed, IMC Battery, Feed, for Injector "A" Feed, for Injector "B" ESC Reference Pulse High ESC Reference Pulse Low ESC Signal ESC Distributor Grd ESC Denotation Sensor Input Module - PTC, Ground Plane Sensor, Secondary PTC Sensor, Primary PTC Glow Plug, Feed or Sensor Feed, Voltage Regulator Control (Diode Isolated) Feed, Glow Plug Relay Return, Glow Plug Relay Wait Lamp Switched Grd for "Water in- k" Indicator Glow Plug, Feed or Sense, Passenger Side Power Seat - 6-Way - Fore and Down Relay to Motor Power Seat - 6-Way - Aft and Up, Relay to Motor Feed, Lt Side Trailer and Direction Feed, Rt Side Trailer and Direction Wdo Control Rf Up - Passenger Sw. Wdo Control Rf Down - Passenger Sw Wdo Control Lr Up - Lr Sw.
"V<'C:--?,:_? :;~ZS" "!A!!f. ~... If' " ELECTRICAL CIRCUIT IDENTIFICATION (Cont'd) Circu it Name 669 Wdo Control Lr Down - Lr Sw. 670 Wdo Control R R Up - R R Sw. 671 Wdo Control R R Down - R R Sw. 756 ~ Feed, Vac Sol (For Electronic Distributor) 801 Feed, EFI Battery, Fusible Link Protected 804 Feed, EFI, Ign. Sw. "Crank", Fusible Link Protected 807 Feed, EFI Battery, 808 Feed, EFI Module Fast Idle Valve Output and 3-810 Feed, Distributor Electronics 811 Feed, EFI Module Group Two Injector Output Fusible Link Protected 812 Pink Feed, EFI Module Group One Injector Output Fusible Link Protected 813 Feed, EFI Distributor Trigger and 815, 814 Feed, EFI Distributor Trigger and 815, Name 815 Feed, EFt Module Distributor Trigger Output, 816 Pink Accelerator Enrichment Input #2 817 Accelerator Enrichment Input #1 818 Light Green Accelerator Enrichment Sw. Supply Voltage 819 - Classed Throttle Sw_ 820 Wide Open Throttle Switch 821 Ground, EFI Module Coolant Temp. Sensor Output 822 Ground Resistive, Coolant Temp. Sensor Contl'olled 823 Ground, EFI Module Air Temp_ Sensor Output 824 Ground, Resistive Air Temp. Sensor 827 Feed, EF I Module Elec Fuel Pump Output 828 Feed, EFI, Ign. Sw. "On & Crank" 831 Feed, EFI Module EGR Solenoid Output, I