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 headlamp switch connector.
  2. Connect a fused jumper from the headlamp switch connector cavity F (DK BLU/WHT) to ground.

Do the interior lamps illuminate?

--

Go to Step 5

Go to Step 3

3

Test CKT 1495 (DK BLU/WHT) for an open. Refer to Testing for Continuity in Wiring Systems.

Is there an open in CKT 1495?

--

Go to Step 4

Go to Step 7

4

Replace the body control module (SBM). Refer to Body Control Module Replacement in Body Control System.

Is the SBM module replacement complete?

--

Go to Interior Lamps System Check

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5

Test CKT 351 (BLK/WHT) between the headlamp switch and G202 for an open. Refer to Testing for Continuity in Wiring Systems.

Is there an open in CKT 351?

--

Go to Step 6

Go to Step 7

6

Replace the headlamp switch.

Is the headlamp switch replacement complete?

--

Go to Interior Lamps System Check

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7

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

Is the repair complete?

--

Go to Interior Lamps System Check

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