Factory overhead KC's?? I cant say Ive ever seen that from Jeep themselves. Likely added by a dealer or PP. Hopefully some of the other folks will chime in. If I understand they are already installed and of so turn them on and start yanking fuses one at a time to see which kills them. You'll find many of the fuses protect items you'd never guess. IIRC a recent post of a wont start condition dug deep into every logical part. Ended up being something like the dome light fuse that also protected the ecm or something screwy like that.