Symptom Chart

WARNING: This page is about a different car, the 2004 Ford Explorer Sport Trac, 2003 Ford Explorer Sport Trac, and 2003 Ford Explorer Sport. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Self-test diagnostics must be carried out before proceeding to the Symptom Chart.

SYMPTOM CHART

Condition	Possible Sources	Action
The speed control is inoperative - no flash codes	Speed control cable not attached to the throttle Circuitry Brake pedal position (BPP) switch Speed control cable Speed control switches Speed control servo Anti-lock brake control module	Go to PINPOINT TEST A .
The set speed fluctuates	Speed control switch Circuitry Speed control cable Speed control servo Anti-lock brake control module Engine	Go to PINPOINT TEST B . REFER to the INTRODUCTION - CNG, FLEX-FUEL & GASOLINE article. REPAIR the engine as necessary.
The speed control does not disengage when the brakes are applied	BPP switch Circuitry Deactivator switch Binding speed control cable Speed control servo	Go to PINPOINT TEST C .
The speed control switch is inoperative	Circuitry Speed control switch Speed control servo	Go to PINPOINT TEST D .
Flash with last switch pressed and dynamic pull occurs at the throttle	-	Test passed.
Flash with last switch pressed, but no dynamic pull occurs at the throttle and the speed control is inoperative	Speed control cable Speed control servo	Go to PINPOINT TEST E .
Flash with last switch pressed, dynamic pull occurs at the throttle and the speed control is inoperative	Circuitry Speed control servo	Go to PINPOINT TEST A .
Flash Code 2 - brake pedal position (BPP) switch circuit failure	Circuitry BPP switch Speed control servo	Go to PINPOINT TEST F .
Flash Code 3 - deactivator switch circuit failure	Circuitry Deactivator switch Speed control servo	Go to PINPOINT TEST G .
Flash Code 4 - speed signal circuit failure	Circuitry Speed control servo Anti-lock brake control module	Go to PINPOINT TEST A .
Flash Code 5	Speed control servo	INSTALL a new speed control servo REFER to SPEED CONTROL SERVO . CARRY OUT the self-test diagnostics.
The speed control indicator lamp is always on	Circuitry Instrument cluster Speed control servo	Go to PINPOINT TEST H .
The speed control indicator is inoperative	Circuitry Instrument cluster Speed control servo	REFER to HORN .