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

Connect a test lamp from CKT 1732 (ORN) above the headliner at the LH or the RH sunshade mirror to ground. Refer to Sunroof Sunshade Replacement .

Does the test lamp light?

--

Go to Step 4

Go to Step 3

3

Locate and repair the open in CKT 1732 (ORN).

Is the repair complete?

--

Go to Interior Lamps System Check

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4

Connect a J 39200 digital multimeter (DMM) from CKT 1850 (BLK) at the LH or the RH sunshade mirror lamp to G202.

Is the resistance less than the specified value?

1 ohms

Go to Step 5

Go to Step 6

5

Replace the sunshade mirror lamp.

Is the repair complete?

--

Go to Interior Lamps System Check

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6

Locate and repair the open in CKT 1850 (BLK) between the sunshade mirror lamp and G202.

Is the repair complete?

--

Go to Interior Lamps System Check

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