Test Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 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 380 ohms 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 Diagnostic Test
| 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 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 9 | Go to Step 8 |
| 5 |
|
380 Ω | Go to Step 6 | Go to Step 11 |
| 6 |
|
1000-10K Ω | Go to Step 7 | Go to Step 13 |
| 7 | Test the windshield wiper switch signal 1 circuit for a short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 17 | Go to Step 15 |
| 8 | 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 17 | Go to Step 15 |
| 9 | 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 17 | Go to Step 10 |
| 10 | 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 17 | Go to Step 13 |
| 11 | Test the windshield wiper switch voltage supply circuit for an open or short to ground. Refer to Circuit Testing
andWiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 17 | Go to Step 12 |
| 12 | Test the windshield wiper switch signal 1 circuit for an open or high resistance. Refer to Circuit Testing
andWiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 17 | Go to Step 13 |
| 13 | Inspect for poor connections at the windshield wiper/washer switch. Refer toTesting for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 17 | Go to Step 14 |
| 14 | Replace the windshield wiper/washer switch. Refer to Multifunction, Turn Signal Switch Replacement
in Steering Wheel and Column. Is the repair complete? |
- | Go to Step 17 | - |
| 15 | 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 17 | Go to Step 16 |
| 16 | Replace the windshield wiper motor. Refer to Wiper Transmission Replacement . Is the repair complete? |
- | Go to Step 17 | - |
| 17 | Operate the system in order to verify the repair. Did you correct the condition? |
- | System OK | Go to Step 3 |