Interlock Safety Switch

The wiring for the neutral start switch is incredibly simple, and you should be able to trace it easily. The CENTER terminal of the switch on the transmission grounds when in neutral or park. That wire, from the center of that connector, goes up the firewall and plugs into one of the two "push on" connectors on the start relay. The remaining push on connector is the "start" power from the ignition switch when twisted to the start position.

Those two "push on" or flag terminals on the star relay are the magnetic coil terminals. So the power, in start, comes from the key, to and through the relay coil, then down to ground through the neutral switch.

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