Test Description
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
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
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Wiper/Washer System Schematics Connector End View Reference: Wiper/Washer System Connector End Views DEFINITION: Windshield wipers are inoperative in one or more modes. |
||||
| 1 | Did you perform the Wiper/Washer System Description and Operation and perform the necessary inspections? | - | Go to Step 2 | Go to Symptoms - Wiper/Washer Systems |
| 2 |
|
- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Do the windshield wipers operate in the high speed mode? | - | Go to Step 5 | Go to Step 4 |
| 4 |
|
- | Go to Step 8 | Go to Step 7 |
| 5 |
|
390 Ω | Go to Step 6 | Go to Step 9 |
| 6 |
|
1000 Ω-10K Ω | Go to Step 13 | Go to Step 11 |
| 7 | 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. Did you find and correct the condition? |
- | Go to Step 15 | Go to Step 13 |
| 8 | Repair the wiper switch ground circuit for an open or high resistance. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Is the repair complete? |
- | Go to Step 15 | - |
| 9 | 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. Did you find and correct the condition? |
- | Go to Step 15 | Go to Step 10 |
| 10 | Test the windshield wiper switch signal circuit for an open or short to ground. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 15 | Go to Step 11 |
| 11 | 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. Did you find and correct the condition? |
- | Go to Step 15 | Go to Step 12 |
| 12 | Replace the windshield wiper/washer switch. Refer to Multifunction, Turn Signal Switch Replacement
in Steering Wheel and Column. Did you complete the replacement? |
- | Go to Step 15 | - |
| 13 | 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. Did you find and correct the condition? |
- | Go to Step 15 | Go to Step 14 |
| 14 | Replace the windshield wiper motor module. Refer to Wiper Motor Replacement . Did you complete the replacement? |
- | Go to Step 15 | - |
| 15 | Operate the system in order to verify the repair. Did you correct the condition? |
- | System OK | Go to Step 3 |