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.
1985 Ford EXP 1.6 4, Standard, MTXIIIFACTORY OEM SERVICE PROCEDURE
Primary Circuit Continuity
- Disconnect wiring harness connector from ignition module. Inspect connector for dirt, corrosion, or damage. Repair if necessary. Attach negative voltmeter lead to distributor base. Measure voltage at battery.
- With negative voltmeter lead still attached to distributor base, insert positive lead into connector terminal No. 2. See Figure. Place ignition switch in "RUN" position. Measure voltage at terminal No. 2.
- If reading is 90% of battery voltage, turn ignition off. Proceed to WIRING HARNESS test. If reading is less than 90% of battery voltage, turn ignition off. Connect wiring harness. Proceed to the IGNITION COIL PRIMARY VOLTAGE test.
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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