Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1994 Ford Probe Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Wheel Speed Sensor Signal Check
- Turn ignition off. Raise and support vehicle. Disconnect ABS control unit connector. On Escort and Tracer, ABS control unit is located underneath passenger's seat. On Probe, ABS control unit is located behind left cowl side trim panel.
- Set DVOM on 5-volt AC scale. While rotating each wheel at 60 RPM (one revolution per second), measure and record voltage at each of following wires at ABS control unit connector. See PINPOINT TEST WSS-5 CIRCUIT IDENTIFICATION table.
- If ALL voltages are .25-3.0 volts AC, go to PINPOINT TEST WSS-7 . If voltage is not with specification, go to PINPOINT TEST WSS-6 .
PINPOINT TEST WSS-5 CIRCUIT IDENTIFICATION
| Wire Color | Application | |
|---|---|---|
| Escort & Tracer | ||
| Black/White & Orange/White | LF Wheel Speed Sensor | |
| Black/Red & Orange | RF Wheel Speed Sensor | |
| Black/Blue & Red/Blue | LR Wheel Speed Sensor | |
| Black/Orange & White | RR Wheel Speed Sensor | |
| Probe | ||
| White & Red | LF Wheel Speed Sensor | |
| Yellow & Orange | RF Wheel Speed Sensor | |
| Yellow/Green & Yellow/Blue | LR Wheel Speed Sensor | |
| Green & Blue | RR Wheel Speed Sensor | |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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