Diagnostic Test

WARNING: This page is about a different car, the 2014 RAM 3500 HD and 2014 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. Turn the Left Turn Signal on.
3. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 2
  No
  - 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. Repair as needed. If no problems are found, test complete.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (L563) LEFT REAR LIGHTING FAULT SENSE CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the Left Turn Signal off.
2. Turn the ignition off.
3. Disconnect the Left Tail Lamp Assembly harness connector.
4. Disconnect the BCM C6/F harness connector.
5. Turn the ignition on.
6. Measure the voltage between ground and the (L563) Left Rear Lighting Fault Sense circuit.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage in the (L563) Left Rear Lighting Fault Sense circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
CHECK THE (L563) LEFT REAR LIGHTING FAULT SENSE CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Measure the resistance of the (L563) Left Rear Lighting Fault Sense circuit between the Left Tail Lamp Assembly harness connector and the BCM C6/F harness connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 4
  No
  - Repair the open in the (L563) Left Rear Lighting Fault Sense circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (Z906) GROUND CIRCUIT FOR AN OPEN
1. Measure the resistance of the (Z906) Ground circuit between the Left Tail Lamp Assembly harness connector and ground.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 5
  No
  - Repair the open in the (Z906) Ground circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE BCM FOR CORRECT OPERATION
1. Turn the ignition off.
2. Reconnect the BCM C6/F harness connector.
3. Connect a 12-volt test light between the (L563) Left Rear Lighting Fault Sense circuit and the (Z906) Ground circuit at the Left Tail Lamp Assembly harness connector.
4. Turn the ignition on.
5. Turn the Left Turn Signal on.
  Does the test light blink on and off?
  
  Yes
  - Replace the Left Tail Lamp Bulb in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace the Body Control Module (BCM). Refer to MODULE, BODY CONTROL, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .