Had a 98 TJ, same thing. I unhooked the plugs and used a small needle nose plier to slightly turn the spades about 1/8 turn all in the same direction. Then carefully push the connection back together. Many of the Chrysler dash hookups seem to have the same problem, something to do with the fit of the spades into the receptors. the 1/8 "twist" will make the connections tighter and there shouldn't be anymore "0". OJTV8XJ turned me on to this a couple of years ago and it worked great. Even did the same thing to my 96 Neon "The Turd" when it started doing it a few months ago. Hope that helps.
shortfat300