I recently bought a 99 cherokee sport (4.0L) and have had a number of electrical issues. First off, the high beams did not work, I repleced the sockets and now the headlights work as they should. However I noticed yesterday; whenever I hit the brakes and I have,the headlights OFF the back light on the dash comes on, the radio backlight dims, and the parking lights come on. It only acts maybe half the time I drive it and when the headlights are on everything works as it should. I also noticed the drivers side brake light is out, the filliment looks fine and the sockets clean but I changed the bulb anyways, the tail light works but when I hit the brakes I get nothing.

Thanks,
Matt

 

Do your headlights flicker at all?

Check fuses 7 and 23 on the passenger side kickpanel. Fuses 19 and 23 at the Power Distrubution Box under the hood.

 

I'd also have a peek at the brake light switch and surroundings

 

Thanks everybody, turned out the conector in the cargo area behind the spare tire had burnt up and was shorting out. Jeeps a little rusty and missing the bumper corner so there was a good amount of mud and water in and around the conectors. I used some wire nuts in place of the conector, riveted some sheet metal underneath and all is well now.

Thanks