GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Outside Rearview Mirror Schematics

Connector End View Reference: Vehicle Access Connector End Views

1

Did you review the Outside Mirror Description and Operation?

Go to Step 2

Go to Symptoms - Vehicle Access

2

Verify that the heated mirrors inoperative fault is present.

Do the heated mirrors operate properly?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Does the rear window defogger operate properly?

Go to Step 4

Go to Diagnostic Starting Point - Fixed and Moveable Windows

4

Test the heated mirror/rear defog relay coil supply voltage circuit of the appropriate outside rearview mirror harness connector for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 8

Go to Step 5

5

Test the ground circuit of the appropriate outside rearview mirror harness connector for an open. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 8

Go to Step 6

6

Inspect for poor connections at the harness connector of the appropriate outside rearview mirror. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 8

Go to Step 7

7

Replace the appropriate outside rearview mirror face. Refer to Outside Rearview Mirror Glass Replacement .

Did you complete the replacement?

Go to Step 8

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8

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2