Diagnostic Test

WARNING: This page is about a different car, the 2009 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

INTEGRATED POWER MODULE
1. Turn the ignition off.
2. Replace the Trailer Tow Left Turn relay with and known good relay.
3. Using the scan tool, clear all FCM DTCs.
4. Activate the Left Turn Signal.
5. Using the scan tool, read the Wiper DTCs.
  Does the scan tool read: B166C-LEFT TRAILER TOW LAMP CONTROL CIRCUIT HIGH?
  
  Yes
  - Replace the Integrated Power Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Test complete.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .