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. 3
1991 Ford Probe GL, Standard
Keyboard Function Check No. 3
1991 Ford Probe GL, StandardSECTION Keyboard Function Check No. 3
- Using Gauge System Tester (Rotunda 021-00055), connect one lead of tester to Black/White wire at trip computer connector and other lead to ground.
- Slowly adjust resistance from 0-1000 ohms and back to 0 again. Check if A/ECON, I/ECON, AV/SPD and DIST functions are working.
- If some or no functions are working, replace trip computer. If all functions are working, repair Black/White wire between trip computer and keyboard.
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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.