GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the power door locks system check performed?

--

Go to Step 2

Go to Diagnostic System Check - Power Door Systems

2

Does the right front window operate from the left front power window switch?

--

Go to Step 18

Go to Step 3

3

  1. Turn the ignition to the ON position.
  2. Connect a test lamp.
  3. Backprobe the LF power window switch between terminal F of connector C1 (Sedan) and ground.
  4. Press the RF switch in the LF power window switch to the UP position.

Does the test lamp light?

--

Go to Step 4

Go to Step 6

4

  1. Connect a test lamp.
  2. Backprobe the LF power window switch between terminal C, of connector C1 (Sedan) and positive battery voltage.
  3. Press the RF switch in the LF power window switch to the DOWN position.

Does the test lamp light?

--

Go to Step 5

Go to Step 6

5

  1. Connect a test lamp.
  2. Backprobe the RF power window switch between terminal A and ground.
  3. Press the RF switch in the LF power window switch to the UP position.

Does the test lamp light?

--

Go to Step 7

Go to Step 8

6

Replace the LF power window switch. Refer to Rear Side Door Window Switch Replacement .

Is the repair complete?

--

Go to Diagnostic System Check - Power Door Systems

--

7

  1. Connect a test lamp.
  2. Backprobe the RF power window switch between terminal E and ground.
  3. Press the RF switch in the LF power window switch to the DOWN position.

Does the test lamp light?

--

Go to Step 9

Go to Step 10

8

Repair the open in CKT 166 between the LF power window switch and the RF power window switch. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Diagnostic System Check - Power Door Systems

--

9

  1. Connect a test lamp.
  2. Backprobe the RF power window switch between terminal D and ground.
  3. Press the RF switch in the LF power window switch to the UP position.

Does the test lamp light?

--

Go to Step 11

Go to Step 13

10

Repair the open in CKT 167 between the LF power window switch and the RF power window switch. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Diagnostic System Check - Power Door Systems

--

11

  1. Connect a test lamp.
  2. Backprobe the RF power window switch between terminal H and ground.
  3. Press the RF switch in the LF power window switch to the DOWN position.

Does the test lamp light?

--

Go to Step 12

Go to Step 13

12

  1. Disconnect the RF power window motor.
  2. Connect a test lamp between terminal A of the RF power window motor connector and ground.
  3. Press the RR switch in the in the LF power window switch to the UP position.

Does the test lamp light?

--

Go to Step 14

Go to Step 15

13

Replace the RF power window switch. Refer to Rear Side Door Window Switch Replacement .

Is the repair complete?

--

Go to Diagnostic System Check - Power Door Systems

--

14

  1. Connect a test lamp between terminal B of the RF power window motor connector and ground.
  2. Press the RF switch in the LF power window switch to the DOWN position.

Does the test lamp light?

--

Go to Step 16

Go to Step 17

15

Repair the open in CKT 666 between the RF power window motor. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Diagnostic System Check - Power Door Systems

--

16

Replace the RF power window motor.

Is the repair complete?

--

Go to Diagnostic System Check - Power Door Systems

--

17

Repair the open in CKT 667 between the RF power window motor and the RF power window switch. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Diagnostic System Check - Power Door Systems

--

18

  1. Connect a test lamp.
  2. Backprobe the LF power window switch between terminal A and ground (Sedan).
  3. Backprobe the RH wiring harness junction block between connector C3 terminal B8 and ground (Coupe).

Does the test lamp light?

--

Go to Step 19

Go to Step 21

19

  1. Connect a test lamp.
  2. Backprobe the RF power window switch between terminal B and ground.

Does the test lamp light?

--

Go to Step 20

Go to Step 22

20

Replace the RF power window switch.

Is the repair complete?

--

Go to Diagnostic System Check - Power Door Systems

--

21

  1. Replace the LF power window switch (Sedan).
  2. Ensure the power window circuit breaker is functioning. If OK, replace the RH wiring harness junction block.

Is the repair complete?

--

Go to Diagnostic System Check - Power Door Systems

--

22

  1. Repair the open in CKT 1307 (Sedan).
  2. Repair the open in CKT 141 (Coupe).

Is the repair complete?

--

Go to Diagnostic System Check - Power Door Systems

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