GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the entire Interior Lights System Check performed?

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Go to Step 2

Go to Interior Lamps System Check

2

  1. Disconnect the vanity lamp connector.
  2. Place the interior lamp switch in the ON position.
  3. Connect a DMM from the vanity lamp connector cavity B (DK BLU/WHT) to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 3

Go to Step 5

3

Connect a DMM from the vanity lamp connector cavity B (DK BLU/WHT) to cavity A (BLK).

Is the voltage within the specified range?

10-15 V

Go to Step 4

Go to Step 6

4

Replace the inoperative vanity lamp. Refer to Vanity Mirror Lamp Replacement .

Is the vanity lamp replacement complete?

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Go to Interior Lamps System Check

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5

Repair the open in CKT 149 (DK BLU/WHT) between C310 and the inoperative vanity lamp. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Interior Lamps System Check

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6

Repair the open in CKT 850 (BLK) between C310 and the inoperative vanity lamp. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Interior Lamps System Check

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