shut off switch

[69trk]

Originally Posted by bigjimzlll

The NHRA says the main switch must stop all elctrical functions along with the engine. It does not say it has to kill all of the power.
Most people run the alternator wire to the line side of switch or battery.

I use a painless hi amp relay. My main switch only controls the control wiring of the heavy duty relay. I also have a main in cab toggle switch wired in series with the main switch. This way I can shut off all of the power to the pump and engine with a flick of an in cab switch.
It's pretty slick.

Thanks for the advice, i think that i'll do the same thing.