Diagnostic Aids
If the PWR WDO fuse is open, the cause could be one of the following:
| • | A short to ground in the accessory voltage circuit. |
| • | A short to ground in one of the power window signal or power window motor control circuits. This would open the PWR WDO fuse with a switch activation. |
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Power Window Schematics DEFINITION: This diagnostic procedure should be used to diagnose a total failure of the power window system. | |||
1 | Did you review the Power Window Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Doors |
2 |
Do both power windows operate up and down from both switches? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | 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 WDO fuse. Is PWR WDO fuse 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 power window master switch ground circuit and B+. Does the test lamp illuminate? | Go to Step 9 | Go to Step 11 |
7 | Test for a short to ground in the accessory voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. 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 in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 9 |
9 | Inspect for poor connections at the left front power side window 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 13 | Go to Step 12 |
10 | Repair the open in power window master switch accessory voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 13 | -- |
11 | Repair the open in power window master switch ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 13 | -- |
12 | Replace the left front power side 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 |
