Symptom Chart

WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM CHART

Condition	Possible Sources	Action
No communication with the anti-lock brake system (ABS) module	Smart junction box (SJB) fuse 19 (10A) Circuitry ABS module	GO to PINPOINT TEST A .
No communication with the instrument cluster	Circuitry. Instrument cluster.	REFER to INSTRUMENT CLUSTER to continue diagnosis of the instrument cluster.
The red brake warning indicator does not self-check	Instrument cluster	REFER to INSTRUMENT CLUSTER .
The red brake warning indicator stays on when the ignition switch is in RUN	Circuitry Low brake fluid warning switch Parking brake switch Instrument cluster	REFER to INSTRUMENT CLUSTER .
The yellow anti-lock brake system (ABS) warning indicator is always on	Circuitry Instrument cluster ABS module	GO to PINPOINT TEST H .
Spongy brake pedal with no warning indicator	Air in the brake hydraulic system	GO to PINPOINT TEST I .
Poor vehicle tracking during anti-lock function	Air in the hydraulic brake system Hydraulic control unit (HCU)	GO to PINPOINT TEST J .
	Base brake system	REFER to BRAKE SYSTEM-GENERAL INFORMATION .
The traction control is inoperative	Anti-lock brake system (ABS) module	INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE .
The traction control system cannot be disabled	Circuitry Traction control switch Instrument cluster	GO to PINPOINT TEST K .
The traction control switch indicator is never/always on	Circuitry Traction control switch Instrument cluster	GO to PINPOINT TEST L .