GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you review power mirrors operation and perform the necessary inspections?

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Go to Step 2

Go to Symptoms

2

  1. Disconnect the LH Outside Rearview Power Mirror.
  2. Connect a test lamp from CKT 89 (LT GRN) cavity D at the LH outside power mirror to ground.
  3. Press the switch in the DOWN position.

Does the test lamp light?

--

Go to Step 5

Go to Step 3

3

  1. Using a test lamp backprobe CKT 89 (LT GRN) from the Outside Rearview Mirror Remote Control Switch to ground.
  2. Press the Outside Rearview Mirror Remote Control Switch to the DOWN position

Does the test lamp light?

--

Go to Step 6

Go to Step 4

4

Replace the outside rearview mirror control switch. Refer to Power Accessory Switch Panel Replacement .

Is the repair complete?

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Go to Step 7

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5

Replace the LH outside power mirror. Refer to Outside Rearview Mirror Replacement .

Is the repair complete?

--

Go to Step 7

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6

Locate and repair an open in CKT 89 (LT GRN) between the outside power mirror and the outside rearview mirror control switch.

Is the repair complete?

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Go to Step 7

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7

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 2