GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Body Rear End Schematics

1

Did you review the body rear end description and operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Body Rear End

2

Operate the rear quarter windows.

Do the rear quarter windows operate?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Does only one rear quarter window operate?

Go to Step 4

Go to Step 6

4

  1. Disconnect the inoperative rear quarter window actuator.
  2. Connect a test lamp between the open circuit of the rear quarter window actuator and a good ground.
  3. Operate the rear quarter window switch to the open position.

Does the test lamp illuminate?

Go to Step 5

Go to Step 10

5

  1. Connect a test lamp between the close circuit of the rear quarter window actuator and a good ground.
  2. Operate the rear quarter window switch to the close position.

Does the test lamp illuminate?

Go to Step 14

Go to Step 11

6

  1. Disconnect the rear quarter window switch.
  2. Connect a test lamp between the battery positive voltage circuit of the rear quarter window switch and a good ground.

Does the test lamp illuminate?

Go to Step 7

Go to Step 12

7

Connect a test lamp between the battery positive voltage circuit of the rear quarter window switch and the ground circuit of the rear quarter window switch.

Does the test lamp illuminate?

Go to Step 8

Go to Step 13

8

Test the open circuit of the rear quarter window actuator for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 10

Go to Step 9

9

Test the close circuit of the rear quarter window actuator for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

Go to Step 15

10

Repair the open or high resistance in the open circuit of the rear quarter window actuator. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

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11

Repair the open or high resistance in the close circuit of the rear quarter window actuator. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

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12

Repair the open or high resistance in the battery positive voltage circuit of the rear quarter window switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

--

13

Repair the open or high resistance in the ground circuit of the rear quarter window switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

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14

Inspect for poor connections at the harness connector of the inoperative rear quarter window actuator. 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 18

Go to Step 16

15

Inspect for poor connections at the harness connector of the rear quarter 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 18

Go to Step 17

16

Replace the inoperative rear quarter window actuator. Refer to Body Side Window Actuator Replacement in Body Rear End.

Did you complete the replacement?

Go to Step 18

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17

Replace the rear quarter window switch. Refer to Quarter Window Switch Replacement in Body Rear End.

Did you complete the replacement?

Go to Step 18

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18

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3