How to diagnose and replace the ignition module on Lincoln Town Car?

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The ignition control module is a delicate and relatively expensive electronic component, and improper procedures could lead to damage to the module or other electronic devices, including the EEC-IV microprocessor. Check with your dealer about the Federally mandated extended warranty on devices under computer control before attempting to diagnose and replace the module yourself. Note that certain models use a special DuraSpark II ignition control module with altitude compensation features for spark timing and engine performance at high altitudes. An intermittent no-start condition may occur in some years and models of SSI and DuraSpark ignition systems, where the engine starts momentarily and shuts down instantly or runs the duration of a trip but won't restart afterward. Striking the module or applying heat won't fix it, confirming the ignition control module as defective. To check the ignition control module on DuraSpark systems, examine power to the module, resistance of the distributor stator, and ground circuit continuity. For TFI-IV ignition control modules, inspect power, resistance between terminals, and the PIP to SPOUT circuit. Always ensure safety measures when working with the ignition system. For ignition control module replacement, detach the negative battery cable, unplug electrical connectors, remove mounting screws, and replace the module or stator. Reassemble components following the reverse order of removal and use appropriate lubrication or dielectric grease when specified.

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