GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Interior Lights Schematics

Connector End View Reference: Master Electrical Component List in Wiring Systems

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

Inspect the rear compartment courtesy lamp bulb.

Is the bulb filament open?

Go to Step 9

Go to Step 3

3

Use a test lamp connected to a good ground in order to test for battery positive voltage at the rear compartment courtesy lamp connector.

Does the test lamp illuminate?

Go to Step 4

Go to Step 8

4

Test for a high resistance or an open in the rear compartment courtesy lamp switched circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Is the rear compartment courtesy lamp switch control circuit open?

Go to Step 6

Go to Step 5

5

  1. Disconnect the rear compartment courtesy lamp switch.
  2. Connect a fused jumper wire across the rear compartment lamp switch connector bypassing the switch contacts.
  3. Reinstall the rear compartment lamp, if removed.

Does the rear compartment lamp illuminate?

Go to Step 10

Go to Step 7

6

Repair the open in the rear compartment lamp switch control circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 11

--

7

Repair the open in the rear compartment lamp switch ground circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 11

--

8

Repair the open in the rear compartment lamp battery positive voltage circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 11

--

9

Replace the rear compartment courtesy lamp bulb. Refer to Rear Compartment Courtesy Lamp Replacement .

Did you complete the repair?

Go to Step 11

--

10

Replace the rear compartment courtesy lamp switch.

Did you complete the repair?

Go to Step 11

--

11

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3