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 DIAGNOSIS (SINGLE PAGE)ELECTRICALGAUGESINSTRUMENT PANEL - ELECTRONICTESTINGKEYBOARD FUNCTION CHECK NO. 4
1991 Ford Probe GL, Standard
Keyboard Function Check No. 4
1991 Ford Probe GL, StandardSECTION Keyboard Function Check No. 4
- Using Gauge System Tester (Rotunda 021-00055), connect one lead of tester to Black/Yellow wire at keyboard 10-pin connector.
- Instrument keyboard 10-pin connector is located behind trip computer keyboard. See IDENTIFYING ELECTRONIC KEYBOARD CIRCUITS illustration.
- Slowly adjust resistance from 0-1000 ohms and back to 0 again. Check if METRIC, ETA, SET and RESET functions are working.
- If no functions are working, go to KEYBOARD FUNCTION CHECK NO. 5. If all functions are working, replace keyboard. If some functions are working, replace trip computer.
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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.