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Home >> Jeep >> 2007 >> Commander Base, 4.7 P, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> DTCS P0645 To P1593 >> P0691-Cooling Fan 1 Relay Control Circuit Low >> Possible Causes
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Possible Causes

Possible Causes 
(A16) FUSED B+ CIRCUIT
(N201) LOW SPEED FAN RELAY CONTROL CIRCUIT OPEN
(N201) LOW SPEED FAN RELAY CONTROL CIRCUIT SHORTED TO GROUND
LOW SPEED RADIATOR FAN RELAY
FRONT CONTROL MODULE (FCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .