GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

DEFINITION: The rear compartment courtesy lamp does not turn on when the rear compartment lid is open.

1

Check the rear compartment courtesy lamp bulb filament.

Is the rear compartment courtesy lamp bulb filament open?

--

Go to Step 5

Go to Step 2

2

  1. Disconnect the rear compartment courtesy lamp electrical connector.
  2. Turn the ignition switch from off to on.
  3. Using a test light, backprobe between the rear compartment courtesy lamp terminal A and ground.

Is the test light on?

--

Go to Step 3

Go to Step 6

3

  1. Disconnect the rear compartment lid ajar indicator switch electrical connector.
  2. Using a test light, connect between B+ and the rear compartment lid ajar indicator switch harness connector terminal A.

Is the test lamp on?

--

Go to Step 4

Go to Step 7

4

  1. Connect a test light between B+ and the rear compartment lamp terminal B.
  2. Connect a 10A fused jumper between the rear compartment lid ajar indicator switch harness connector terminals A and B.

Is the test light on?

--

Go to Step 8

Go to Step 9

5

Replace the rear compartment courtesy lamp bulb. Refer to Bulb Usage for bulb specification.

Is the repair complete?

--

System OK

--

6

Repair poor connection or open in circuit 1732.

Is the repair complete?

--

Go to Step 10

--

7

Repair poor connection or open in circuit 350.

Is the repair complete?

--

Go to Step 10

--

8

Replace the rear compartment lid ajar indicator switch.

Is the repair complete?

--

Go to Step 10

--

9

Repair poor connection or open in circuit 737.

Is the repair complete?

--

Go to Step 10

--

10

  1. Turn the ignition switch off.
  2. Reinstall the connectors/components removed.
  3. Check for BCM DTCs. Refer to Diagnostic Trouble Code (DTC) Displaying in Body Control System.

Are there any DTCs stored in the BCM?

--

Go to Diagnostic System Check - Body Control System in Body Control System

System OK