Does anyone know what the "Park/Neutral" relay does? I ask because I was looking at my relay box and comparing it to the picture in the owner's manual and I noticed that my P/N Relay was plugged into a spot that was mapped in the manual as "NOT USED." This would leave me to assume that it's function isn't being performed since it's in an unused plug. There's nothing in it's designated plug, everything else on the relay box is as it should be except the power antenna relay which I pulled when I bought the car to prevent the antenna from moving since I never use the radio. Anyone got any ideas?

I see nothing anywhere for a Park/Neutral relay. Pull it out and try to start the car. If it doesnt start, It's part of a neutral safety switch circut. But according to my diagrams, your car doesn't have one. Theres a mechanical interlock preventing you from turning the key if not in park or neutral.