Here is a typical schematic of the 1990 Grand Wagoneer Diagram. The ignition system consists of: battery, starter relay, ignition switch, electric choke switch, carb bowl vent solenoid, electric choke heater, ignition module, coil resistance wire, distributor harness, , starter solenoid, starter motor, and automatic transmission neutral start and back-up switch. (click image to enlarge)

Grand Wagoneer Ignition System Wiring Diagram

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