GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Is the inoperative mirror the LH outside rearview mirror?

--

Go to Step 2

Go to Step 6

2

  1. Disconnect the LH outside rearview mirror wiring harness connector.
  2. Using a test light, frontprobe between B+ and LH outside rearview mirror harness connector (male side) terminal C.
  3. Set the outside mirror select switch to LH mirror.
  4. Press and hold the outside remote control rearview mirror switch DOWN button.

Did the test light illuminate?

--

Go to Step 7

Go to Step 3

3

Check for a poor connection or an open in circuit 89.

Is there a poor connection or an open in circuit 89?

--

Go to Step 4

Go to Step 5

4

Repair a poor connection or an open in circuit 89.

Has the repair been completed?

--

Go to Outside Mirrors System Check

--

--

5

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

Has the repair been completed?

--

Go to Outside Mirrors System Check

--

6

  1. Disconnect the RH outside rearview mirror wiring harness connector.
  2. Using a test light, frontprobe between B+ and the RH outside rearview mirror harness connector (male side) terminal C.
  3. Set the outside mirror select switch to RH mirror.
  4. Press and hold the outside remote control rearview mirror switch DOWN button.

Did the test light illuminate?

--

Go to Step 7

Go to Step 8

7

Replace the mirror motor pack. Refer to Outside Rearview Mirror Motor Replacement

Has the repair been completed?

--

Go to Outside Mirrors System Check

--

8

Check for a poor connection or an open in circuit 889.

Is there a poor connection or an open in circuit 889?

--

Go to Step 9

Go to Step 5

9

Repair a poor connection or an open in circuit 889.

Has the repair been completed?

--

Go to Outside Mirrors System Check

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