Re: Installing KC Fogs on YJ-Im an electrical Idiot!
These gentlemen are all correct. The engineers at Chrysler agree with them so much that on the '94 YJ the factory fog lights are on a relay system as described. So - you don't need to add a relay in this case; just wire your new lights to the factory points at the bumper (16 Ga. Black is ground and 16 Ga. Light Blue is hot from the relay. Again, not much of a learning experience but it couldn't be easier.
I don't know about other years, but the above is true of '94YJs.
As for the CJDave advice about using the relay system for lighting, I did exactly that for some absolutely killer backup lights that I use.