ez wiring harness

I wouldn't run HID headlamps & electric fuel pump directly off the key switch, especially if a later car w/ switch buried in the column where it is fun to change. The bulkhead connector is also a problem area. Never run an electric radiator fan off the factory ignition circuit, like the gomers did in my 64 Valiant (ran all the time w/ key on).

You are finding why many don't find the expensive after-market wire harnesses a good value. Any changes from factory design and you are doing a lot of custom wiring anyway.