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Home >> Jeep >> 2010 >> Commander Sport, 5.7 T, 4WD >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Front Control Module (FCM) - Electrical Diagnostics >> DTC Troubleshooting >> B1644-Rear Left Turn Control Circuit High >> Possible Causes
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Possible Causes

Possible Causes 
(L63) LEFT REAR TURN SIGNAL CONTROL CIRCUIT SHORTED TO VOLTAGE
(L63) LEFT REAR TURN SIGNAL CONTROL CIRCUIT OPEN
INTEGRATED POWER MODULE (IPM)
FRONT CONTROL MODULE (FCM)