hello my 2000 jeep cherokee auto has a ghost problem the alt gauge drops to o volts and sometimes goes to 12v and sometimes stays at normal 14v if stays at o long enough will not start nothing seems to trigger this problem bumps,lights,shaking wires evertrhing seems fine had alt cheked off jeep tested good put back on same prob. looked at other forums and noone has this unique prob. has anyone exp. this before help please.

 

This sounds kinda like what happened to me; voltage gauge was at 9, tightened some of the wires on the alternator (they were loose) worked for about two weeks, then when I'd start it it sat at 14v for a while, then it'd drop. Turned out to be the voltage regulator on my alternator, so I just replaced it. But if your alternator checks out, that's outside of my league. The guy that helped me replace it used some kind of voltage meter or something to check it.

How did you have the alternator checked?

 

i had alternator cheked at advanced auto im not confident in their ability first guy said it was bad and the other guy walked over and held a second button down and said it's good . with that i think i will go to napa if we can figure out the problem.