Where are the harnesses?

 

start at fuel pump and follow it back look for breaks, bare wires touching

 

you have checked all fuses in both fuse boxes for 12 volts at both sides with test light/meter ...

 

It's the computer. I'm going to the JY after work tomorrow to get a new one. Will I have to get it flashed after I replace it since it's a used one or will it work without? Also, what years will work for it? Mine is a 96 with a 98 motor. I only swaped the motor not the harnesses too.

 

write down the numbers on the computer and match them with another

 

Would the BCM cause this? I went to the dealer and they wouldn't sell me a new copm, they said it's probly the BCM and not the comp. Does the BCM have several harnesses and relays on it? If so then I found it, if not then I have no clue what it looks like. The one I found is under the DS dash. Is this it? I have went over every ground known to man and they are all good. Checked every fuse on the Jeep, replaced with 3 different clusters and still nothing. My gauges go on and off. Sometimes they work and sometimes they don't. I have to get it e-checked by this saturday and they won't check it if my engine light is on. I had it scaned and it keeps comming up the TPS is bad(high voltage at sensor). I tried 7 brand new sensors from 3 different parts stores and it keeps comming up that it's bad. Whats the deal with that?

 

Just something easy to try. I've seen gauge problems (plural), mentioned as a symptom of a bad CPS.

I won't bring it up again, I promise!

 

I tried disconnecting the CPS, o2's, airbag mod, checked every harness I could find,fuses and relays, grounds, gauge cluster, BCM, ECM, disconnected every after market accessory and added a new ground to the the gauges. What am I missing?

 

All i can say is i feel your pain,my 1998 cherokee limited has me in fits also,my issue is weird,all my gauges work until i turn the head lights on,then my tack drops,no speedo,odemeter,rear wiper comes on.Have afriend who is a tech,says that the ground around the headlight or a wire arcing out in that area is most likely causing this,i will be checking soon as i get time----also forgot my turn signals do not work,when the headlights are on

 

Well, I've got a story for both of you for what it's worth. The lights on a little Toyota truck where extra goofy. Like if I hit the brake the front running lights would come on. I don't even want to talk about the blinkers. (I had cleaned things up). I ended up taking a 20 foot cord, maybe from an old vacuum cleaner and hooked it right to the NEG post on the battery. Then I went around with the other end grounding things that should be grounded. It turned out (right away), that the whole bed wasn't grounding. I was working...I just added a good jumper from the bed to the cab and off I went.

So there's one way to check for a bad ground

 

I'm calling it quits and just gonna wheel it and thats it. When I pull the fuse it runs great so, it is what it is. Thanks for all your suggestions.