GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2003 🢒 CTS - RHD 🢒 Body and Accessories 🢒 Body Rear End 🢒 Trunk Ajar Indicator Inoperative

Trunk Ajar Indicator Lamp/Message Inoperative

Important: If this vehicle is not equipped with GM Trap Alert please verify Trap Alert is not enabled by reprogramming the RIM before using this table. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.

Step

Action

Yes

No

Schematic Reference: Body Rear End Schematics

1

Did you perform the Body Rear End Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Body Rear End

2

Open the rear compartment.

Is the trunk ajar indicator illuminated/message displayed?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3
  1. Install a scan tool.
  2. Turn ON the ignition with the engine OFF.
  3. Open the rear compartment.
  4. With a scan tool observe the trunk ajar switch signal input in the RIM data list.

Does the scan tool indicate the trunk ajar switch signal is active?

Go to Step 9

Go to Step 4

4
  1. Disconnect the rear compartment lid ajar switch.
  2. Connect a fused jumper between the rear compartment lid ajar switch signal circuit and a good ground.

Is the trunk ajar indicator illuminated/message displayed?

Go to Step 5

Go to Step 7

5

Connect a fused jumper between the rear compartment lid ajar switch signal and ground circuits.

Is the trunk ajar indicator illuminated/message displayed?

Go to Step 6

Go to Step 8

6

Inspect for poor connections at the harness connector of the rear compartment lid ajar switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

Go to Step 10

7

Repair open or high resistance in the signal circuit of the rear compartment lid ajar switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

--

8

Repair open or high resistance in the ground circuit of the rear compartment lid ajar switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

--

9

Replace the instrument panel cluster/message center. Refer to Instrument Cluster Replacement in Instrument Panel, Gages, and Console or Radio Replacement in Entertainment.

Did you complete the repair?

Go to Step 11

--

10

Replace the rear compartment lid ajar switch. Refer to Rear Compartment Lid Switch Replacement .

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