For a 1998 Ford 4.6L engine, the ignition coil wiring diagram typically includes a primary circuit with a power wire (usually red) connected to the positive terminal of the coil and a ground wire (often black) connected to the negative terminal. The negative terminal is also connected to the engine control module (ECM) for signal control. Secondary wires from the coil lead to the spark plugs, distributing the high voltage needed for ignition. Always refer to a specific service manual for detailed and accurate wiring diagrams.
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