GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Interior Lights System Check performed?

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Go to Step 2

Go to Interior Lamps System Check

2

Inspect for an open in CKT 640 (ORN) between S333 (DeVille) or S340 (Eldorado) and the inoperative vanity mirror. Refer to Testing for Continuity in Wiring Systems.

Is CKT 640 OK?

--

Go to Step 3

Go to Step 5

3

Inspect for an open in CKT 1250 (BLK) between S334 (DeVille) or S339 (Eldorado) and the inoperative vanity mirror. Refer to Testing for Continuity in Wiring Systems.

Is CKT 1250 OK?

--

Go to Step 4

Go to Step 5

4

Replace the vanity mirror. Refer to Vanity Mirror Lamp Replacement .

Is the repair complete?

--

Go to Interior Lamps System Check

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5

Repair the suspect wiring. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Interior Lamps System Check

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