xtooltipelement Service Information 2004 Chevrolet C Silverado - 2WD Sierra, Silverado VIN C/K Service Manual Body Wipers/Washer Systems Diagnostic Information and Procedures Document ID: 815265 Wipers Inoperative - One or More Modes Test Description The numbers below refer to the step numbers on the diagnostic table. 5. This step tests for continuity through the 390 Ω resistor in the windshield wiper/washer switch. 6. This step tests for continuity through the delay resistors in the windshield wiper/washer switch. The measured resistance will change in sequence from low to high as the delay speed is increased. Wipers Inoperative - One or More Modes Schematic Reference: Wiper/Washer Schematics Connector End View Reference: Wiper/Washer Connector End Views DEFINITION: Windshield wipers are inoperative in one or more modes. Did you perform the Wiper/Washer 1 System Description and Operation and perform the necessary inspections? Go to Step 2 1. Turn the ignition ON, with the engine OFF. 2. Attempt to operate the 2 windshield wipers in all modes. Does the system operate normally? Go to Symptoms - Wiper/Washer Systems Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3
3 Do the windshield wipers operate in the low speed mode? Go to Step 4 Go to Step 8 4 Do the windshield wipers operate in the high speed mode? Go to Step 6 Go to Step 5 5 1. Turn the ignition OFF. 2. Disconnect the multifunction turn signal harness connector C3. 3. Connect a fused jumper wire from the windshield wiper switch high signal circuit terminal in the body harness connector half to a good ground. 4. Turn the ignition ON, with the engine OFF. 6 Do the windshield wipers operate at high speed? 1. Turn the ignition OFF. 2. Disconnect the windshield wiper motor module connector. 3. Test the resistance from the windshield wiper switch voltage supply circuit terminal to the windshield wiper switch signal circuit terminal in the windshield wiper motor harness connector. 4. Operate the windshield wiper/washer switch in the following positions: o MIST o LO 390 Ω Go to Step 10 Go to Step 9 7 Is the resistance near the specified value in all of the listed switch positions? 1. Test the resistance from the windshield wiper switch voltage supply circuit terminal to the windshield wiper switch signal circuit terminal in the 1000 Ω 10K Ω Go to Step 7 Go to Step 11 Go to Step 15 Go to Step 13
windshield wiper motor harness connector. 2. Operate the windshield wiper/washer switch in all of the delay positions. 8 Does the resistance remain within the specified values from low to high as the delay speed is increased? Test the windshield wiper switch low singal circuit ofr an open or high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. 9 Test the windshield wiper switch high signal circuit for an open or high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Go to Step 17 Go to Step 15 10 Repair the wiper switch ground circuit for an open or high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Go to Step 17 Go to Step 15 11 Is the repair complete? Test the windshield wiper switch voltage supply circuit for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Go to Step 17 12 Test the windshield wiper switch signal circuit for an open or short to Go to Step 17 Go to Step 12 Go to Step 17 Go to Step 13
ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. 13 Inspect for poor connections at the windshield wiper/washer switch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. 14 Replace the windshield wiper/washer switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column. Go to Step 17 Go to Step 14 15 Did you complete the replacement? Inspect for poor connections at the windshield wiper motor module. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Go to Step 17 16 Replace the windshield wiper motor module. Refer to Windshield Wiper Motor Replacement. Go to Step 17 Go to Step 16 Did you complete the replacement? Operate the system in order to verify the repair. 17 Go to Step 17 Did you correct the System OK Go to Step 3 You are about to leave the website of General Motors and view the content of an external website. That website is not owned or controlled by, or affiliated with General Motors or its subsidiaries, and it is subject to its separate terms and conditions and other agreements, as well as its privacy policies. General Motors cannot be held responsible for the content of external websites. OK Cancel
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