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Home >> Jeep >> 2009 >> Commander Overland, RWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Front Control Module (FCM) - Electrical Diagnostics >> DTC Troubleshooting >> B166F-Right Trailer Tow Lamp Control Circuit Low >> Diagnostic Test
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Diagnostic Test

  1. INTEGRATED POWER MODULE 
    1. Turn the ignition off.
    2. Replace the Trailer Tow Right Turn relay with and known good relay.
    3. Using the scan tool, clear all IPM DTCs.
    4. Activate the Right Turn Signal.
    5. Using the scan tool, read the Wiper DTCs.

      Does the scan tool read: B166F-RIGHT TRAILER TOW LAMP CONTROL CIRCUIT LOW?

      Yes 

      No