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Home >> Jeep >> 2009 >> Grand Cherokee Limited, 3.7 K, AWD >> Repair and Diagnosis >> Engine Performance >> Ignition System >> (Front Control Module (FCM) - Electrical Diagnostics) >> DTC Troubleshooting >> B1670-Right Trailer Tow Lamp Control Circuit High >> 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. With the scan tool, clear all IPM DTCs.
    4. Activate the Right Turn Signal.
    5. With the scan tool, read the Wiper DTCs.

      Does the scan tool read: B1670-RIGHT TRAILER TOW LAMP CONTROL CIRCUIT HIGH?

      Yes 

      No