Diagnostic Test

INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, clear all TIPM DTCs.
3. Turn the Rear Fog Lamps on.
4. With the scan tool read the DTC information.
  Does the scan tool read: B1663-REAR FOG LAMP CONTROL CIRCUIT LOW?
  
  Yes
  - Go to step 2
  No
  - The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
(L239) REAR FOG LAMP CONTROL CIRCUIT SHORT TO GROUND

Fig 1: Checking Rear Fog Lamp Control Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the TIPM C6 harness connector.
3. Disconnect the Left and Right Fog Lamp harness connectors.
4. Measure the resistance between ground and the (L239) Right Low Beam Control circuit.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the (L239) Rear Fog Lamp Control circuit for a short to ground condition.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Replace the Totally Integrated Power Module (TIPM) in accordance with the service information.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .