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Home >> Jeep >> 2005 >> Grand Cherokee Laredo, 3.7 K, AWD >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0579 To P0633 >> Diagnosis And Testing >> P0579-Speed Control Switch 1 Performance >> Possible Causes

Possible Causes

Possible Causes 
(V371) S/C SWITCH NO.1 SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
(V71) S/C SWITCH NO.1 SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
(V371) S/C SWITCH NO.1 SIGNAL CIRCUIT OPEN
(V71) S/C SWITCH NO.1 SIGNAL CIRCUIT OPEN
(V397) SWITCH RETURN CIRCUIT OPEN
(V937) SWITCH RETURN CIRCUIT OPEN
(V371) S/C SWITCH NO.1 SIGNAL CIRCUIT SHORTED TO GROUND
(V71) S/C SWITCH NO.1 SIGNAL CIRCUIT SHORTED TO GROUND
(V371) S/C SWITCH NO.1 SIGNAL CIRCUIT SHORTED TO THE (V397) SWITCH RETURN CIRCUIT
(V71) S/C SWITCH NO.1 SIGNAL CIRCUIT SHORTED TO THE (V937) SWITCH RETURN CIRCUIT
STEERING COLUMN CONTROL MODULE
SPEED CONTROL SWITCH
PCM

Always perform  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  before proceeding.