GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Disconnect inoperative window switch.
  2. Using a test light, backprobe between B+ to terminal A of the inoperative window switch harness connector.
  3. Turn the ignition switch on.

Is the test light on?

--

Go to Step 5

Go to Step 2

2

Check for a poor connection or open in the following:

    • (LR) circuit 169.
    • (RR) circuit 171.
    • (RF) circuit 167.

Is there a poor connection or open in the circuit?

--

Go to Step 3

Go to Step 4

3

Repair poor connection or open in:

    • (LR) circuit 169.
    • (RR) circuit 171.
    • (RF) circuit 167.

Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 24

--

4

Replace the LF window switch. Refer to Door Lock and Side Window and Outside Rearview Mirror Remote Control Switch Replacement .

Did you complete the repair?

--

Go to Step 24

--

5

With the test light in the same place, press and hold the inoperative window down switch, on the LF window switch.

Is the test light on?

--

Go to Step 6

Go to Step 8

6

Check for a short to ground in the following:

    • (LR) circuit 169.
    • (RR) circuit 171.
    • (RF) circuit 167.

Is there a short in the circuit?

--

Go to Step 7

Go to Step 4

7

Repair a short in the following:

    • (LR) circuit 169.
    • (RR) circuit 171.
    • (RF) circuit 167.

Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 24

--

8

Using a test light, probe between B+ to terminal E of the inoperative window switch harness connector.

Is the test light on?

--

Go to Step 12

Go to Step 9

9

Check for a poor connection or open in the following:

    • (LR) circuit 168.
    • (RR) circuit 170.
    • (RF) circuit 166.

Is there a poor connection or open in the circuit?

--

Go to Step 10

Go to Step 11

10

Repair poor connection or open in the following:

    • (LR) circuit 168.
    • (RR) circuit 170.
    • (RF) circuit 166.

Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 24

--

11

Replace the LF window switch. Refer to Door Lock and Side Window and Outside Rearview Mirror Remote Control Switch Replacement .

Did you complete the repair?

--

Go to Step 24

--

12

With the test light in the same place, press and hold the inoperative window up switch, on the LF window switch.

Is the test light on?

--

Go to Step 13

Go to Step 15

13

Check for a short to ground in the following:

    • (LR) circuit 168.
    • (RR) circuit 170.
    • (RF) circuit 166.

Is there a short in the circuit?

--

Go to Step 14

Go to Step 11

14

Repair a short in the following:

    • (LR) circuit 168.
    • (RR) circuit 170.
    • (RF) circuit 166.

Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 24

--

15

  1. Using a test light, probe between terminal B of the inoperative window switch harness connector and ground.
  2. Turn the ignition switch on.

Is the test light on?

--

Go to Step 17

Go to Step 16

16

Repair poor connection or open in circuit 1307 between S307 and terminal B of the inoperative window switch harness connector. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 24

--

17

  1. Reconnect the inoperative window switch connector.
  2. Disconnect the inoperative window's regulator motor.
  3. Using a test light, probe the inoperative window regulator motor harness connector terminal A to terminal B.
  4. Turn the ignition switch on.
  5. Press the inoperative window switch UP and then DOWN.

Is the test light on in both positions?

--

Go to Step 18

Go to Step 19

18

Replace the inoperative window's regulator motor. Refer to Front Side Door Window Regulator Motor Replacement or Rear Side Door Window Regulator Motor Replacement .

Did you complete the repair?

--

Go to Step 24

--

19

  1. Disconnect the inoperative window switch connector:
  2. Check for an open or short to ground in the following:
  3. • (LR) circuit 669.
    • (RR) circuit 671.
    • (RF) circuit 667.

Is there an open or short to ground in the circuit?

--

Go to Step 20

Go to Step 21

20

Repair open or short to ground in the following:

    • (LR) circuit 669.
    • (RR) circuit 671.
    • (RF) circuit 667.

Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 24

--

21

Check for a open or a short to ground in the following:

    • (LR) circuit 668.
    • (RR) circuit 670.
    • (RF) circuit 666.

Is there an open or short in the circuit?

--

Go to Step 22

Go to Step 23

22

Repair the open or a short to ground in the following:

    • (LR) circuit 668.
    • (RR) circuit 670.
    • (RF) circuit 666.

Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 24

--

23

Replace the inoperative window switch. Refer to Door Lock and Side Window and Outside Rearview Mirror Remote Control Switch Replacement or Rear Side Door Window Switch Replacement .

Did you complete the repair?

--

Go to Step 24

--

24

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Diagnostic System Check - Door Systems