Stopped by the store on the way home Friday and when I went to leave my Jeep would not start, wouldn't even try to. I figured it was the Starter as the one on it when I bought it was not even the correct starter for this Jeep (It had a lil' adapter to make it work) it also was purchased used, and looks like hell, So I bought a brand new one and threw it on, still same problem, Battery is Brand new, Alternator is good, new sparks and plugs, I even replace the 15A fuse under the hood that controls the starter just incase, switched the relay fuse with another fuse I know is good, nothing. I'm thinking it has to be the ignition or the WCM, does anyone know a way to check for sure? And if it is the Ignition would I need an entire new Ignition, keys and WCM to fix it? All the lights work as normal, I can hear the fuel pump pop on, none of the connections on the batt/starter seem loose or bad, no corrosion, I just put on new terminals and a new ground a few months ago when I put the new battery in, but still just nothing happens when I try to start it, I turned the headlights on and normally they dim when the engine cranks and that does not happen. It's an 07 3.7 6 speed.