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Home >> Jeep >> 2017 >> Wrangler Sahara, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 100 ((Driver Door Module (DDM) (DMFL/R) - Electrical Diagnostics)) >> DTC Troubleshooting >> B2860-15-Door Ambient Light Control - Circuit Short To Battery Or Open >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR AN ACTIVE DTC 
    NOTE:

    It is recommended that a battery charger be connected and set on low during this test.

    NOTE:

    Be sure the thumb wheel on the Panel Dimmer Switch (also known as Dimmer Module) is turned fully on during this test.

    1. Turn the ignition on.
    2. With the scan tool, create a Vehicle Scan Report and attach it to the repair order.
    3. Turn the ignition on to off three times and leave in the On position.
    4. Turn the park lamps on.
    5. Wait one minute.
    6. With the scan tool, read the active DTCs.

      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 and repair as necessary. If no problems are found, test complete.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  2. CHECK (M33) DRIVER DOOR AMBIENT LAMP DRIVER CIRCUIT SHORTED TO VOLTAGE 
    1. Turn the ignition off.
    2. Remove the inner door panel trim in accordance with the Service Information. Refer to PANEL, DOOR TRIM, REMOVAL .
    3. Leave the Driver Door Map Pocket Lamp connector connected.
    4. Disconnect the Driver Door Module C5 harness connector.
    5. Turn the ignition on.
    6. Turn the Park Lamps on.
    7. Measure the voltage between ground and the (M33) Driver Door Ambient Lamp Driver circuit in the Driver Door Module C5 harness connector.

      Is there any voltage present?

      Yes 

      • Repair the (M33) Driver Door Ambient Lamp Driver circuit for a short to voltage.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Go To  3
  3. CHECK (M33) DRIVER DOOR AMBIENT LAMP DRIVER CIRCUIT OPEN 
    1. Turn the ignition off.
    2. Be sure the Driver Door Map Pocket Lamp connector is still connected.
    3. Turn the ignition on.
    4. Connect a fused jumper wire, connected to battery to the (M33) Driver Door Ambient Lamp Driver circuit in the DDM C5 harness connector.
    5. Connect a jumper wire, connected to ground to the (M34) Driver Door Lighting Return circuit in the DDM C5 harness connector

      Does the Driver Door Map Pocket Lamp illuminate brightly?

      Yes 

      No 

      • Go To  4
  4. CHECK (M34) DRIVER DOOR LIGHTING RETURN CIRCUIT OPEN 
    1. Measure the resistance of the (M34) Driver Door Lighting Return circuit between the DDM C5 harness connector and the Driver Door Map Pocket Lamp harness connector.

      Is the resistance below 2.0 Ohms on the (M34) Driver Door Lighting Return circuit to the Map Pocket Lamp?

      Yes 

      • Replace the Driver Door Ambient Lamp in Accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Repair the open in the (M34) Driver Door Lighting Return circuit.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
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