GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Power Door Systems Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Power Door Systems

2

Verify that the power mirrors are inoperative.

Do the power mirrors operate normally?

--

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

Go to Step 3

3

  1. Disconnect the outside rear view mirror switch.
  2. Connect a test lamp from CKT 840 (ORN) cavity G at the outside rear view mirror control switch to ground.

Does the test lamp illuminate?

--

Go to Step 5

Go to Step 4

4

Locate and repair an open in CKT 840 (ORN) between the outside rear view mirror control switch and the underhood fuse block. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Do the mirrors operate properly?

--

Go to Step 8

Go to Step 5

5

Connect a test lamp from CKT 840 (ORN) cavity G to CKT 1850 (BLK) cavity B at the outside rear view mirror switch.

Does the test lamp illuminate?

--

Go to Step 6

Go to Step 7

6

Replace the outside rear view mirror switch.

Do the mirrors operate properly?

--

Go to Step 8

Go to Step 7

7

Locate and repair an open in CKT 1850 (BLK) between the outside rear view mirror switch and G204. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Do the mirrors operate properly?

--

Go to Step 8

--

8

Operate the system in order to verify the repair.

Did you find and correct the condition?

--

System OK

Go to Step 3