GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Was the Lighting Systems Diagnostic System Check Performed?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Inspect the rear compartment courtesy lamp bulb.

Is the bulb filiment open?

Go to Step 6

Go to Step 3

3

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

Does the testlamp light?

Go to Step 4

Go to Step 7

4

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

Does the testlamp light?

Go to Step 5

Go to Step 8

5

  1. Disconnect the rear compartment courtesy lamp switch.
  2. Use a testlamp connected to battery positive voltage in order to test for ground at terminal B of the rear compartment courtesy lamp switch connector.

Does the testlamp light?

Go to Step 10

Go to Step 11

6

Replace the rear compartment courtesy lamp bulb. Refer to Cargo Lamp Replacement .

Is the repair complete?

System OK

--

7

Inspect for poor connections at the rear compartment courtesy lamp connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Was a condition found and corrected?

System OK

Go to Step 12

8

Inspect for poor connections at the rear compartment courtesy lamp switch connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Was a condition found and corrected?

System OK

Go to Step 9

9

Repair the open in CKT 737 between the lamp connector and the switch connector. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

System OK

--

10

Replace the rear compartment courtesy lamp switch.

Is the repair complete?

System OK

--

11

Repair the open in the ground CKT 150. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

System OK

--

12

Repair the open in CKT 1732 between splice S222 and the rear compartment courtesy lamp connector. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

System OK

--