Diagnostic Aids
| • | If the PWR WDO circuit breaker cycles, the cause could be one of the following: |
| - | A short to ground in the RAP fuse supply voltage circuit |
| - | A short to ground in one of the power window signal or power window motor control circuits--This would cycle the PWR WDO circuit breaker with a switch activation. |
| • | The WIN RAP relay supplies voltage to the power window system anytime the ignition is in the Accessory or RUN position and also during retained accessory power (RAP) mode. If voltage is not available to the PWR WND circuit breaker, the cause could be any of the following: |
| - | The presence of DTC B1477 or B1478 in the BCM |
| - | The WIN RAP relay battery supply voltage circuit is open or shorted to ground |
| - | The WIN RAP relay ground circuit is open |
| - | A faulty WIN RAP relay |
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Moveable Window Schematics Connector End View Reference: Vehicle Access Connector End Views DEFINITION: This diagnostic procedure should be used to diagnose a total failure of the power window system. | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 |
Do both power windows operate up and down from both switches? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
3 | Did either power window operate from either switch? | Go to Power Window Inoperative - Driver Door or Power Window Inoperative - Passenger Door | Go to Step 4 |
4 | Check condition of the PWR WND circuit breaker. Is PWR WND circuit breaker open? | Go to Step 7 | Go to Step 5 |
5 |
Does the test lamp illuminate? | Go to Step 6 | Go to Step 10 |
6 | Connect the test lamp between the driver window switch ground circuit and battery positive voltage. Does the test lamp illuminate? | Go to Step 9 | Go to Step 11 |
7 | Test for a short to ground in the PWR WND circuit breaker supply voltage circuit. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 13 | Go to Step 8 |
8 | Test for a short to ground in both the power window signal circuits and the power window motor control circuits. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 13 | Go to Step 9 |
9 | Inspect for poor connections at the driver window switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 13 | Go to Step 12 |
10 | Test for an open in driver window switch PWR WND circuit breaker supply voltage circuit. Refer to Circuit Testing and Wiring Repairs . Does the Power Window System operate normally? | Go to Step 13 | |
11 | Repair the open in driver window switch ground circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 13 | -- |
12 | Replace the driver window switch. Refer to Front Side Door Window Switch Replacement . Did you complete the repair? | Go to Step 13 | -- |
13 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
