GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you review the power mirrors circuit description and perform the necessary inspections?

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Go to Step 2

Go to Symptoms

2

Verify that the power mirrors are inoperative.

Do the power mirrors operate normally?

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

Go to Step 3

3

Inspect the MIR/LKS fuse.

Is the MIR/LKS fuse open?

--

Go to Step 4

Go to Step 5

4

Repair a short to ground in CKT 840 (ORN).

Did you complete the repair?

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Go to Step 10

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5

  1. Disconnect the outside rear view mirror switch connector.
  2. Using a DMM between CKT 840 (ORN), cavity G and ground.

Does the voltage measure near the specified value?

B+

Go to Step 7

Go to Step 6

6

Repair an open in CKT 840 (ORN) between the outside rear view mirror switch and the IP fuse block.

Did you complete the repair?

--

Go to Step 10

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7

Connect a DMM between CKT 1850 (BLK) cavity B and B+.

Does the voltage measure near the specified value?

B+

Go to Step 9

Go to Step 8

8

Repair an open in CKT 1850 (BLK) between the rear view mirror and ground G202.

Did you complete the repair?

--

Go to Step 10

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9

Replace the outside rear view mirror switch.

Did you complete the repair?

--

Go to Step 10

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10

Operate the system in order to verify the repair.

Did you find and correct the condition?

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System OK

Go to Step 3