Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 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 Park Lamps on.
3. 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.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
LEFT FRONT LAMP ASSEMBLY
1. Turn the ignition off.
2. Disconnect the Left Front Lamp Assembly harness connector.
3. Turn the ignition on.
4. With the scan tool, read DTCs
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 3
  No
  - Replace the Left Front Lamp Assembly in accordance with the Service Information. Refer to UNIT, FRONT LAMP, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (L551) LEFT FRONT LIGHTING FAULT SENSE CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the BCM F harness connector.
3. Measure the resistance between ground and the (L551) Left Front Lighting Fault Sense circuit.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the (L551) Left Front Lighting Fault Sense circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace the Body Control Module (BCM) accordance with the Service Information. Refer to MODULE, BODY CONTROL, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .