GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the automatic day-night mirror system check?

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Go to Step 2

Go to Automatic Day-Night Mirrors System Check

2

  1. Disconnect the inside rear view mirror connector.
  2. Turn the ignition switch to the RUN position.
  3. Measure the voltage between the inside rear view mirror connector terminal 1 (YEL) and ground.

Is the measured voltage within the specified range?

10-15 V

Go to Step 3

Go to Step 5

3

Measure the voltage between the inside rear view mirror connector terminal 1 (YEL) and terminal 2 (BLK).

Is the measured voltage within the specified range?

10-15 V

Go to Step 4

Go to Step 6

4

Replace the inside rear view mirror. Refer to Inside Rearview Mirror Replacement .

Is the replacement complete?

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Go to Automatic Day-Night Mirrors System Check

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5

Repair the open or short to ground in CKT 43 (YEL). Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Automatic Day-Night Mirrors System Check

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6

Repair the open in CKT 1051 (BLK). Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Automatic Day-Night Mirrors System Check

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