GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Power Mirror Switch System Check?

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Go to Step 2

Go to Outside Mirrors System Check

2

  1. Disconnect the outside rearview mirror switch connector.
  2. Using a test lamp, front probe cavity 9 to ground.

Does the test lamp illuminate?

--

Go to Step 3

Go to Step 5

3

Test for an open using a J 39200 DMM in the GRY wire.

Does the wire have an open?

--

Go to Step 4

Go to Step 7

4

Repair the open in the GRY wire between the connector and junction block 3. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Outside Mirrors System Check

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5

Test the BRN/RED wire using a J 39200 DMM between the outside rearview mirror switch and SP257 for an open.

Does the wire have an open?

--

Go to Step 6

Go to Step 9

6

Repair the open in the BRN/RED wire or in the SP257. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Outside Mirrors System Check

--

7

Test the WHT/BLK wire using a J 39200 DMM between the outside rearview mirror switch and SP256 for an open.

Does the wire have an open?

--

Go to Step 8

Go to Step 9

8

Repair the open in the WHT/BLK wire between the connector and junction block 3. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Outside Mirrors System Check

--

9

Replace the outside rearview mirror switch. Refer to Power Mirror Switch Replacement .

Is the repair complete?

--

Go to Outside Mirrors System Check

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