Guys, what you're talking about is a good way to go, but you have to find that wire first. There's a bunch of them to choose from. Then you'll be bringing high amps thru the firewall and looped thru a switch in-cab, which is not a good idea. A relay needs to be used in the engine bay to keep the high current out there where it belongs. A relay draws less than one amp and only requires one light wire thru the firewall. That's why my homegrown system is safe and works so well. I went right to the source at the fuse and can turn it off and on whenever I want in any mode. It's just like someone pulling the fuse for me when I ask for it. It's still easier to cut the right wire behind the dash or destroy the contact points of the selector switch. You don't destroy the whole switch, it just eliminates the auto A/C function and goes back to the way it was in the 70's and 80's. Whatever route you choose, it's a good thing to do. We're all capable of knowing when we need A/C in defrost and when we don't. It's the same thing with ABS. It can get me killed in the snow and even cause problems off-road on steep hills.

Mark Griffin