Ron Francis Safe & Sound Battery Disconect Switch
From Ron Francis Wiring
With this nifty setup, one click of the key fob completely shuts down your car’s entire electrical system — and even more. It’s accomplished by routing your main battery cable through a remote cutoff solenoid that you’ve stashed in a place inaccessible to a thief. Trigger it with the key fob as you walk away, and voila…total power shutdown.