Diagnostic Test

WARNING: This page is about a different car, the 2005 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

1) TEST FOR INTERMITTENT CONDITION
Turn the ignition on.

Clear all FCM DTC's

Turn the Left Turn Signal on.

With the scan tool, read DTC's.

Does the scan tool read: B163C-FRONT LEFT TURN CONTROL CIRCUIT HIGH?

Yes
1. Go To step 2).
No
1. The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
2. Perform BODY VERIFICATION TEST - VER 1 .
2) FRONT LEFT TURN SIGNAL BULB
Turn the ignition off.

Inspect the Front Left Turn Signal Bulb Assembly.

Is the inoperative bulb OK?

Yes
1. Go To step 3).
No
1. Replace the Inoperative bulb in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1 .
3) L61 LEFT TURN SIGNAL CONTROL CIRCUIT OPEN

Fig 1: Checking L61 Left Turn Signal Control Circuit For Open
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the FCM C2 connector.

Measure the resistance of the (L61) Front Left Turn Signal Control circuit.

Is the resistance above 5.0 ohms?

No
1. Repair the (L61) Turn Signal Control circuit for an open.
2. Perform BODY VERIFICATION TEST - VER 1 .
Yes
1. Replace the Front Control Module in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1 .