What is wrong with my jeep it wont start and i have power?
probably your starter
low oil or the starter
if it is trying to crank could be spark issuse. no crank could be starter.
Here is a picture of a starter http://www.google.com/m/search?site=images&source=mog&hl=en&gl=us&client=safari&q=starter&sa=N#i=3 ...... Look in the engine bay for the start and use a hammer to take a couple wacks at it and while your hitting have someone else try and start it..... If that works its definately the starter..... For now you will be able to get a few more starts out of it doing it that way until you replace the starter
You didn't say if the engine turns over but won't start or when you turn the key, it just makes a "click" sound. Which is it?
As stated above do not "wack" the starter with a hammer, tap it, only hard enough that if it was your finger it would hurt a little but not so much you wouldn't hit your finger again. Yeah I know but that's the only way I can think to describe it.
get a new starter and if it turns over and u still can't get a spark try checking the alternator or the spark plugs