Diagnostic Test

WARNING: This page is about a different car, the 2013 Dodge Avenger and 2013 Chrysler 200. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 2
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
CHECK THE VOLTAGE OF THE (M25) COURTESY LAMPS DRIVER CIRCUIT

Fig 1: Measuring Voltage Of Courtesy Lamps Driver Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Cargo Lamp harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (M25) Courtesy Lamps Driver circuit.
  Is the voltage above 10.0 volts?
  
  Yes
  - Go To 3
  No
  - Go To 5
CHECK THE (G78) DECKLID AJAR SWITCH SENSE CIRCUIT

Fig 2: Checking Decklid Ajar Switch Sense Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Measure the resistance between ground and the (G78) Decklid Ajar Switch Sense circuit.
  Is the resistance below 10K Ohms?
  
  Yes
  - Replace the Cargo Lamp in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 4
(G78) DECKLID AJAR SWITCH SENSE CIRCUIT OPEN

Fig 3: Checking Decklid Ajar Switch Sense Circuit Open
Courtesy of CHRYSLER GROUP, LLC
1. Disconnect the Cluster C2 harness connector.
2. Measure the resistance of the (G78) Decklid Ajar Switch Sense circuit.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Replace the Cluster in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Repair the open in the (G78) Decklid Ajar Switch Sense circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (M25) COURTESY LAMPS DRIVER CIRCUIT FOR A SHORT TO GROUND

Fig 4: Checking Courtesy Lamps Driver Circuit For A Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Cluster C2 harness connector.
3. Measure the resistance between ground and the (M25) Courtesy Lamps Driver circuit.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the short to ground in the (M25) Courtesy Lamps Driver circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 6
CHECK THE (M25) COURTESY LAMPS DRIVER CIRCUIT FOR AN OPEN

Fig 5: Checking Courtesy Lamps Driver Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (M25) Courtesy Lamps Driver circuit.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the open in the (M25) Courtesy Lamps Driver circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace the Cluster in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .