How Ignition Switches Are Wired?

Finding the ignition switch, identifying the pins, removing the negative battery cable, attaching the lead wire to the ACC terminal, the relay wire to the ST terminal, the ignition wire to the IGN terminal, and reattaching the negative battery cable are all steps in wiring an ignition switch.

The power lead wires can be attached to the switch’s terminal by unplugging the cable, which also makes the terminals visible.

The Battery, Start, Ignition, and Accessory connections are located on the back of the ignition switch. The following is the process for wiring an ignition switch:

Step 1: Cut the battery’s negative terminal.

Before locating the positive power lead to the switch, the negative battery terminal must first be unhooked. The power lead wire is then connected to the battery terminal after the proper terminal end has been installed on it.

Connect the accessory lead wire in step two.

The next step is to use the appropriate wire termination to connect the accessory lead wire to the accessory terminal. When the ignition is in the ACC position, the accessory lead wire powers additional car equipment like the radio.

Connect the starter relay wire in step three.

The Start terminal on the ignition switch is where the starting relay wire must be connected.

Connect the ignition wire in step four.

The ignition wire must then be connected to the ignition terminal on the ignition switch as the last step. The car ignition, wipers, accessories, and other operating elements are all powered by the IGN terminal. Reconnecting the cable to the negative battery terminal is necessary.

Misha Khatri
Misha Khatri is an emeritus professor in the University of Notre Dame's Department of Chemistry and Biochemistry. He graduated from Northern Illinois University with a BSc in Chemistry and Mathematics and a PhD in Physical Analytical Chemistry from the University of Utah.

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