GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the entire Interior Lights System Check performed?

--

Go to Step 2

Go to Interior Lamps System Check

2

  1. Disconnect the lamp dimmer switch connector.
  2. Connect a fused jumper from the lamp dimmer switch connector cavities E (DK BLU) to F (BLK).

Do all of the courtesy lamps turn on?

--

Go to Step 3

Go to Step 6

3

Connect a DMM from the lamp dimmer switch connector cavity J (ORN) to cavity F (BLK).

Is the voltage within the specified range?

12-14V

Go to Step 4

Go to Step 5

4

Replace the lamp dimmer switch.

Is the lamp dimmer switch replacement complete?

--

Go to Interior Lamps System Check

--

5

Repair the open in CKT 40 (ORN). Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Interior Lamps System Check

--

6

Inspect CKT 1393 (DK BLU) for an open. Refer to Testing for Continuity in Wiring Systems.

Was an open found?

--

Go to Step 7

Go to Step 8

7

Repair the open in CKT 1393 (DK BLU). Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Interior Lamps System Check

--

8

Inspect CKT 1250 (BLK) for an open. Refer to Testing for Continuity in Wiring Systems.

Was an open found?

--

Go to Step 9

Go to Step 10

9

Repair the open in CKT 1250 (BLK). Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Interior Lamps System Check

--

10

Replace the MALL. Refer to Body Control Module Replacement in Body Control Systems.

Is the MALL module replacement complete?

--

Go to Interior Lamps System Check

--