Hello, all. I am looking to put a push start system in my 2003 F-250 XL. It was recently stolen and recovered (not chopped up, thank God) but the ignition cylinder was busted. It wouldn't be hard to replace, but I'm a sucker for toggles and push starts. The problem I'm running into is that on every wiring diagram for the ignition switch on my truck, I see 3 12v constants. 2 yellow and 1 green/purple. My question is, why are there 3 and what do they individually power? I want to be able to cover the broken lock cylinder and leave it on run without any parasitic draw from accessories, etc. when I switch the toggle off. I'll also be wiring a hidden toggle, maybe on the same circuit, as a killswitch. The push button starter circuit is nothing, but in the past I've had trouble with the radio staying on while the cylinder is left on run, using the toggle as a stand-alone ignition switch. Which is what I want to do here. Nobody will discourage me, this is what I want to do with MY truck and I'll make it work one way or another. I'd like some insight and advice on the best way to use 1 toggle to control my ignition. Big thanks to anyone willing to help! Is there maybe a main ground I can interrupt to control all functions on/off at once? Any info will help.