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.
1983 Mercury Capri Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Module-To-Coil Wire Resistance Check
- Disconnect ignition coil connector from ignition coil and disconnect ignition module 3-wire connector. Connect ohmmeter leads to engine ground and "TACH" terminal of ignition coil connector. Measure resistance. Remove ohmmeter leads and reconnect ignition module and coil connectors.
- If resistance was greater than 1 ohm, replace ignition module. If resistance was 1 ohm or less, inspect wiring harness between ignition module and ignition coil.
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.