Should be a light green and a dark green wire under the dash from the main harness that has a rubber fitting that mounts in the hole in the firewall, it has a two prong male end and mounts in a hole that is approx the size of a dime that is above and to the left of the steering column as you face the engine compartment, the switch has the other end of the harness mounted to it, and attaches to the side of the transmission, the rubber end from the harness plugs into the hole from the inside like I said, and the switch runs from the tranny up the front of the firewall and plugs in to the rubber connector with the male ends, just a note though, the part with the rubber connector will unplug from the main harness has a plastic connector in a L shape, I guess my point is if that part is missing just look for the light and dark green wires up under the dash. Hope this helps some.
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