Diagnostic Test

WARNING: This page is about a different car, the 2017 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 BODY VERIFICATION TEST .
CHECK THE (L78) RIGHT FRONT PARK LAMP DRIVER CIRCUIT FOR A SHORT TO VOLTAGE IN THE HARNESS
1. Turn the Park Lamps off.
2. Turn the ignition off.
3. Disconnect the Right Front Lamp Assembly harness connector.
4. Turn the ignition on.
5. Measure the voltage between ground and the (L78) Right Front Park Lamp Driver circuit at the Right Front Lamp Assembly harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage in the (L78) Right Front Park Lamp Driver circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (L78) RIGHT FRONT PARK LAMP DRIVER CIRCUIT FOR VOLTAGE
1. Turn the Park Lamps on.
2. Using a 12-volt test light connected to ground, probe the (L78) Right Front Park Lamp Driver circuit at the Right Front Lamp Assembly harness connector.
  Does the test light illuminate?
  
  Yes
  - Go To 5
  No
  - Go To 4
CHECK THE (L78) RIGHT FRONT PARK LAMP DRIVER CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the BCM A harness connector.
3. Measure the resistance of the (L78) Right Front Park Lamp Driver circuit between the Right Front Lamp Assembly and BCM A harness connectors.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Replace the Body Control Module in accordance with the Service Information. Refer to MODULE, BODY CONTROL (BCM), REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Repair the open in the (L78) Right Front Park Lamp Driver circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (Z910) GROUND CIRCUIT FOR AN OPEN IN THE HARNESS
1. Using a 12-volt test light connected to voltage, probe the (Z910) Ground circuit at the Right Front Lamp Assembly harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Replace the Right Front Lamp Assembly and the Right Front Side Marker lamps in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Repair the open in the (Z910) Ground circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .