According to the instructions it said wire to the oil pump switch.
Forget that. You should be paying attention faster than an idiot switch. Install a manual switch for if something else goes wrong.
So you are in an accident and you are knocked out. Now when are you going to hunt for the manual off switch? Mean while the fuel pumps are running full bore. Get a good oil pressure activated switch and wire it in the circuit. Good insurance in more ways than one!
I have my pumps wired to switches that have a momentary side, center off, on. I have the momentary side hooked up to by-pass the oil switch so that I can fill the carbs before I try to start the car. After I have the bowls filled I switch them to the on position and let the oil switch take care of it from there. Very simple. Also use a relay to the pump. Especially if you have the battery located in the trunk.
Oh by the way I also wired my MSD hot wire to the oil switch. Oil pressure dies and it kills my ignition.
