Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Dakota. However, it is still accessible from the selected car via links, so may be relevant.

INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, clear all FCM DTCs.
3. Actuate the Front Fog Lamps.
4. With the scan tool read the DTC information.
  Does the scan tool read: B1660-FRONT FOG LAMP CONTROL CIRCUIT HIGH?
  
  Yes
  - Go To 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. Refer to BODY VERIFICATION TEST .
FRONT FOG LAMP RELAY
1. Turn the ignition off.
2. Remove and install a known good relay in place of the Front Fog Lamp Relay.
  Do the Front Fog Lamps operate normally?
  
  Yes
  - Replace the Front Fog Lamp Relay in accordance with the service information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3.
FRONT CONTROL MODULE

Fig 1: Checking Voltage Of Front Control Module
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Remove the Front Fog Lamp Relay from the MPD.
3. Remove the FCM from the Module Power Distribution.
4. Measure the voltage of the (L139) Front Fog Lamp Relay Output circuit and ground.
  Is the voltage above 1.0 volts?
  
  Yes
  - Replace the Module Power Distribution center in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Module Front Control in accordance with the service information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .