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.
1987 Ford Cab & Chassis 5.8 H, 4WD, AutomaticFACTORY OEM SERVICE PROCEDURE
Module-To-Coil Wire
- Disconnect and inspect control module 4-wire connector from coil. Disconnect ignition coil connector from coil. Attach an ohmmeter lead to distributor base and the other to "TACH" terminal of ignition coil connector.
- If reading exceeds 100 ohms, replace control module. If reading is 100 ohms or less, inspect wiring harness between control module and ignition coil. After test, connect ignition module and coil connectors.
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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