Overcharge from???
10-12-2017, 05:05 AM
#1
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Join Date: Sep 2017
Location: Mobile AL
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Year: 1997
Model: Grand Cherokee
Engine: 4.0
Overcharge from???
Look, I'm new to auto work. I took on tinkering with the old girl to
keep myself from going mad with boredom. I don't know the codes
nor the alphabet soup. Now you know...
OK, my '97 ZJ 4.0 has developed an odd quirk that scares me. Once in a while it will suddenly peg out my voltage meter. I immediately pull over, shut her down, restart, and all is well. May go days before it happens again. Then again, it may happen 3 times in a 5 mile store run.
Ideas?
keep myself from going mad with boredom. I don't know the codes
nor the alphabet soup. Now you know...
OK, my '97 ZJ 4.0 has developed an odd quirk that scares me. Once in a while it will suddenly peg out my voltage meter. I immediately pull over, shut her down, restart, and all is well. May go days before it happens again. Then again, it may happen 3 times in a 5 mile store run.
Ideas?
Last edited by KK4AXX; 10-12-2017 at 05:10 AM.
10-12-2017, 05:38 AM
#2
Old fart with a wrench
Okay....I'd say take the alternator out and get it tested at an auto electrics shop. You may have a rectifier that's shorting out now and then. An alternator without a rectifier puts out 3 phase AC current.
10-15-2017, 11:31 AM
#3
CF Veteran
If your battery is not well connected to the charging system, you will see the voltage of the system on your dash spike up, as there is no battery to load it.