I've completed my rewire project to a 12 volt alternater system and it came out pretty nice. My original heater and defroster seams to run fine with 12 volts. I have these heater and defrost swithes as shown below that I want to use (those kind of switches are like gold!). Will 12 volts ruin these? I guess I can step them down if I have to but I want to keep it simple. And what size fuses should I use? [img]http://img.villagephotos.com/p/2003-9/378428/switches.jpg[/img]