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.
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HOMESERVICE MANUALSFORD1991PROBE GL, STANDARDREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLANTI-LOCK BRAKE SYSTEMPINPOINT TESTSHUC-2 POWER TO ABS CONTROL UNIT
1991 Ford Probe GL, Standard
HUC-2 Power To Abs Control Unit
1991 Ford Probe GL, StandardSECTION HUC-2 Power To Abs Control Unit
- Set voltmeter to 20V scale. Measure voltage between ABS control unit terminal "G" (Black/Green wire) and ground. With key off, voltage should be zero volts. With key on, voltage should be greater than 10 volts. With engine running, voltage should be greater than 10 volts. If voltage readings are correct, go to HUC-3 ABS CONTROL UNIT GROUND CHECK . If voltage readings are not correct, go to Q-1 BRAKE ON-OFF SWITCH CHECK .
- Measure voltage between ABS control unit terminal 2L (White/Black wire) and ground. With key off, voltage should be 0-3 volts. With key on, voltage should be 0-3 volts. With engine running, voltage should be greater than 12 volts. If voltage readings are correct, go to HUC-3 ABS CONTROL UNIT GROUND CHECK . If voltage readings are not correct, go to Q-1 BRAKE ON-OFF SWITCH CHECK .
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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.