Master Cutoff Switch

[FireSale]

Originally Posted by Jon Sarrett

Your alternator wire and battery cable should be on the same post on the switch. The other post on the switch will run the cable to your starter solenoid.

I had a double pole Moroso to kill the alternator until a short at the starter burned it out. I replaced it with a single pole rotary at half the price wired like this and it works fine. No engine run-on.

[CMcAllister]

Originally Posted by FireSale

I had a double pole Moroso to kill the alternator until a short at the starter burned it out. I replaced it with a single pole rotary at half the price wired like this and it works fine. No engine run-on.

This is the simple legal way to do it without extra wiring, solenoids, etc. You just have to be mindful that the alternator lead is always hot, and pay attention to making sure it is protected where it is routed and when working on the car..