Diagnostic Test

INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, clear all FCM DTCs.
3. Turn the high beam headlamps on.
4. With the scan tool read the DTCs.
  Does the Scan Tool read: B1634-LEFT HIGH BEAM CONTROL CIRCUIT HIGH?
  
  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, Front Control (FCM) - Standard Procedure .
(L33) LEFT HIGH BEAM DRIVER CIRCUIT OPEN

Fig 1: Checking High Beam Driver Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Left Headlamp harness connector.
3. Disconnect the FCM C2 harness connector.
4. Measure the resistance of the (L33) Left High Beam Driver circuit.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the open in the (L33) Left High Beam Driver circuit.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Go to step 3
(L33) LEFT HIGH BEAM DRIVER CIRCUIT SHORTED TO VOLTAGE
1. Turn the ignition on.
2. Measure the voltage on the (L33) Left High Beam Driver circuit.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage in the (L33) Left High Beam Driver circuit.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Replace the Front Control Module (FCM) in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .