GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Interior Lights System Check?

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Go to Step 2

Go to Interior Lamps System Check

2

  1. Disconnect the inside rearview mirror lamp.
  2. Connect a test lamp from CKT 1732 (ORN) from one of the following inside rearview mirror cavities to ground:
  3. • Cavity C (non-electrochromatic mirror)
    • Cavity 7 (electrochromatic mirror)

Does the test lamp light?

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Go to Step 4

Go to Step 3

3

Locate and repair the open in CKT 1732 (ORN) between the body bussed electrical center and inside rearview mirror lamp.

Is the repair complete?

--

Go to Interior Lamps System Check

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4

Connect a J 39200 digital multimeter (DMM) from ground to 1 of the following cavities and test for continuity:

    • Cavity A (non-electrochromatic mirror)
    • Cavity 2 (electrochromatic mirror)

Is there continuity?

--

Go to Step 6

Go to Step 5

5

Locate and repair the open in CKT 1850 (BLK) between the inside rear view mirror lamps and G202.

Is the repair complete?

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Go to Interior Lamps System Check

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6

Replace the inside rear view mirror lamp.

Is the repair complete?

--

Go to Interior Lamps System Check

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