Originally Posted by
wes Kill switch also needs to kill alternator!I recommend the
SR80 Stinger relay for this (80 amp relay). I've had very good luck with it. No failure in over 6 years. It just does it's job and didn't cost a bunch.
Mount the relay up front and run the alternator current through it to keep those wires short. Wire it so the relay is closed when your kill switch is closed, and have it open when your kill switch is open (in the "off" position).