Diagnostic Test

WARNING: This page is about a different car, the 2016 Dodge Durango. 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 the Body Control Module (BCM) DTCs and record on the repair order.
  Is the DTC 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. If no problems are found, test complete.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (L77) LEFT FRONT PARK LAMP DRIVER CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the Park Lamps off.
2. Turn the ignition off.
3. Disconnect the Left Front Lamp Assembly C1 harness connector.
4. Turn the ignition on.
5. Measure the voltage between ground and the (L77) Left Front Park Lamp Driver circuit at the Left Front Lamp Assembly C1 harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage in the (L77) Left Front Park Lamp Driver circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (L77) LEFT FRONT PARK LAMP DRIVER CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the BCM C1/A harness connector.
3. Measure the resistance of the (L77) Left Front Park Lamp Driver circuit between the Left Front Lamp Assembly C1 harness connector and the BCM C1/A harness connector.
  Is the resistance above 3.0 Ohms?
  
  Yes
  - Repair the open in the (L77) Left Front Park Lamp Driver circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 4
CHECK THE (Z901) GROUND CIRCUIT FOR AN OPEN
1. Check for continuity between ground and the (Z901) Ground circuit at the Left Front Lamp Assembly C1 harness connector.
  Is the resistance above 3.0 Ohms?
  
  Yes
  - Repair the open in the (Z901) Ground circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 5
CHECK THE BCM
NOTE:
The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
1. Turn the ignition off.
2. Reconnect the BCM C1/A harness connector.
3. Connect a 12-volt test light between the (L77) Left Front Park Lamp Driver circuit and the (Z901) Ground circuit at the Left Front Lamp Assembly C1 harness connector.
4. Turn the ignition on.
5. Turn the Park Lamps on.
  Does the test light illuminate brightly?
  
  Yes
  - Replace the Left Front Sidemarker Lamp Bulb in accordance with the Service Information. Refer to UNIT, FRONT LAMP, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Body Control Module (BCM) in accordance with the Service Information. Refer to MODULE, BODY CONTROL, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .