So I'm up to the wiring part of the lift pump install. I want to run the pump via an oil pressure switch, around 10lbs, so it only comes on when the motor is actually running. Not just via the ignition power. I dont want override switches etc etc if it can be done without.
Therses a spare port on the LHS of the block I could use to access oil pressure, a big PITA to get to, but it might be doable. I first thought the switch would be just a two wire jobbie, so power runs through the switch from one terminal to the other. Not so. The two wire switches are actual for a gauge, so its a sender in fact. The switches are only a single wire.
So my question is.
How can I implement a single wire oil pressure switch in to turn on the pump?
Or is there a wire in the ignition side of the cars loom thats only powered when the engine is running? Not just with the ignition on.