Diagnostic Aids
The C1 harness connector of each door module contains a separate battery positive voltage circuit that is used exclusively for power window motor operation. However, these individual circuits are spliced into one circuit which is fed by the DR MOD PWR circuit breaker located in the right rear fuse block. If the circuit opens at a point where the separate branches are all connected into one, all power windows will be inoperative. A short to ground anywhere in the circuit will open the DR MOD PWR circuit breaker, which will also cause all power windows to be inoperative. These circuits must not be confused with the positive voltage circuits contained within door module harness connectors C3.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
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This step determines if this is the correct chart for the symptom.
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This step determines if a door module is internally shorted to ground, or the battery positive voltage circuit associated with door module harness connectors C1 is shorted to ground.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Moveable Window Schematics Connector End View Reference: Window Systems Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
Does any window operate? | Go to Step 3 | ||
3 |
Does the test lamp illuminate? | Go to Step 4 | Go to Step 10 |
4 | Connect the test lamp between the 2 fuse block terminals of the DR MOD PWR circuit breaker. Does the test lamp illuminate? | Go to Step 6 | Go to Step 5 |
5 | Operate any one of the power window switches while observing the test lamp. Does the test lamp illuminate? | Go to Step 14 | Go to Step 7 |
Disconnect each door module, one at a time, while observing the test lamp. Does the test lamp go out after any module is disconnected? | Go to Step 8 | Go to Step 11 | |
7 | Test the battery voltage circuit associated with door module harness connectors C1, between the splice and the fuse block for an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 15 | Go to Step 9 |
8 | Inspect for poor connections at the harness connector of the suspect door module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 15 | Go to Step 12 |
9 | Inspect for poor connections at the harness connector of the fuse block. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 15 | Go to Step 13 |
10 | Repair the open in the battery supply circuit of the DR MOD PWR circuit breaker. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 15 | -- |
11 | Repair the short to ground in the battery voltage circuit associated with door module harness connectors C1, between the fuse block and the door modules. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 15 | -- |
12 | Replace the door module that is internally shorted to ground. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 15 | -- |
13 | Replace the fuse block/wiring harness assembly. Did you complete the replacement? | Go to Step 15 | -- |
14 | Replace the DR MOD PWR circuit breaker. 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 2 |
