GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Automatic Day-Night Mirror System Check performed?

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Go to Step 2

Go to Automatic Day-Night Mirrors System Check

2

  1. Disconnect the automatic day-night rear view mirror connector.
  2. Connect a test lamp from CKT 341 (BRN) at the automatic day-night rear view mirror connector cavity  1 to ground.
  3. Place the ignition switch in the RUN position.

Does the test lamp light?

--

Go to Step 3

Go to Step 4

3

Connect a test lamp from CKT 341 (BRN) cavity 1 to CKT 1850 (BLK) cavity 2 of the automatic day-night rear view mirror connector.

Does the test lamp light?

--

Go to Step 5

Go to Step 6

4

Locate and repair open in CKT 341 (BRN) between the automatic day-night rear view mirror and the HVAC 1 fuse.

Is the repair complete?

--

Go to Automatic Day-Night Mirrors System Check

--

5

Replace the automatic day-night mirror. Refer to Inside Rearview Mirror Replacement .

Is the repair complete?

--

Go to Automatic Day-Night Mirrors System Check

--

6

Locate and repair the open in CKT 1850 (BLK) between the automatic day-night rear view mirror and ground.

Is the repair complete?

--

Go to Automatic Day-Night Mirrors System Check

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