Test Description
WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. 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 | Value(s) | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Wiper/Washer System Schematics | ||||
| 1 | Did you perform the Wiper/Washer System Diagnostic System Check? | - | Go to Step 2 | Go to Diagnostic System Check - Wiper/Washer |
| 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 |
|
380 Ω | Go to Step 6 | Go to Step 10 |
| 6 |
|
1000 Ω-10K Ω | Go to Step 14 | Go to Step 12 |
| 7 | Test the windshield wiper switch high signal circuit for an open or high resistance. Refer to CIRCUIT TESTING
and WIRING REPAIRS
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 14 |
| 8 | Test the wiper switch ground circuit for an open or high resistance. Refer to CIRCUIT TESTING
and WIRING REPAIRS
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 9 |
| 9 | Test the windshield wiper switch high signal and ground circuits in the steering column harness for an open or high resistance. Refer to CIRCUIT TESTING
and WIRING REPAIRS
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 12 |
| 10 | Test the windshield wiper switch voltage supply circuit for an open or short to ground. Refer to CIRCUIT TESTING
and WIRING REPAIRS
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 11 |
| 11 | Test the windshield wiper switch signal 1 circuit for an open or high resistance. Refer to CIRCUIT TESTING
and WIRING REPAIRS
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 12 |
| 12 | Inspect for poor connections at the windshield wiper/washer switch. Refer to TESTING FOR INTERMITTENT CONDITIONS AND POOR CONNECTIONS
and CONNECTOR REPAIRS
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 13 |
| 13 | Replace the windshield wiper/washer switch. Refer to MULTIFUNCTION, TURN SIGNAL & HAZARD SWITCH
in Steering Wheel and Column. Did you complete the replacement? |
- | Go to Step 16 | - |
| 14 | Inspect for poor connections at the windshield wiper motor. Refer to TESTING FOR INTERMITTENT CONDITIONS AND POOR CONNECTIONS
and CONNECTOR REPAIRS
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 16 | Go to Step 15 |
| 15 | Replace the windshield wiper motor cover. Refer to Wiper Motor Cover Replacement . Did you complete the replacement? |
- | Go to Step 16 | - |
| 16 | Operate the system in order to verify the repair. Did you correct the condition? |
- | System OK | Go to Step 3 |