GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2007 🢒 STS 🢒 Body Systems 🢒 Lighting 🢒 Rear Compartment Lamp Inoperative

Step

Action

Yes

No

Schematic Reference: Interior Lights Schematics

Connector End View Reference: Lighting Systems Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2
  1. Turn ON the ignition, with the engine OFF.
  2. Press the trunk release switch.

Does the deck lid open?

Go to Step 3

Go to Trunk Release Inoperative

3

Do the courtesy lamps operate properly?

Go to Step 4

Go to Symptoms - Lighting Systems

4
  1. Turn OFF the ignition.
  2. Disconnect the rear compartment lamp.
  3. Turn ON the ignition, with the engine OFF.
  4. Connect a test lamp between the courtesy lamp supply voltage circuit of the rear compartment lamp and a good ground.

Does the test lamp illuminate?

Go to Step 5

Go to Step 9

5

Connect a test lamp between the courtesy lamp voltage supply circuit of the rear compartment lamp and the rear compartment lamp ground control circuit.

Does the test lamp illuminate?

Go to Step 7

Go to Step 6

6

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

Did you find and correct the condition?

Go to Step 12

Go to Step 8

7

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

Did you find and correct the condition?

Go to Step 12

Go to Step 10

8

Inspect for poor connections at the harness connector of the rear compartment lid release actuator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 12

Go to Step 11

9

Locate and repair the following in the courtesy lamp voltage supply circuit of the rear compartment lamp:

    • An open
    • A high resistance
    • A short to ground

Refer to Circuit Testing and Wiring Repairs .

Did you complete the repair?

Go to Step 12

--

10

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

Did you complete the replacement?

Go to Step 12

--

11

Replace the rear compartment lid release actuator. Refer to Rear Compartment Lid Latch Replacement .

Did you complete the replacement?

Go to Step 12

--

12

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2