Voltage Drops at Stop
01-08-2011, 04:31 PM
#16
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Year: 1987,1990,1992
Model: Cherokee
Engine: 4.0
01-08-2011, 04:37 PM
#17
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Location: Lyons, Oregon
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Year: 1991
Model: Cherokee
Engine: 4.0 HO
07-29-2012, 05:38 PM
#19
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Year: 1999
Model: Cherokee
Engine: 4.0L
What is the "ICA sensor" or the "ASD relay"? Lol, having the same problem. XJ runs fine, voltage drops and stays low enough to create a concern on the problem until the next morning, when you drive to work for 10 minutes and start deccelerate, "voltage drops" again.....
04-22-2017, 03:46 PM
#20
Seasoned Member
Voltage meter guage drops at idle
I just installed a upgraded 140 amp alternator and heavy gauge cable kit on my 89 Cherokee. Cable goes from alternator to battery. The voltage meter drops to 10-11 after the engine is warm and at idle like at a stop light. When accelerating and driving the volt needle goes back up to 12-14. No problems with dimming lights, etc.
I don't have a clue.
AVjeeper
I don't have a clue.
AVjeeper
04-22-2017, 07:11 PM
#22
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Year: 2000
Model: Cherokee
Engine: 6 cylinder
Get a voltmeter and measure the voltage at the battery terminals at idle.
That will tell you if your dash gauge is accurate or maybe your alternator is kaputt.
Only other thing i can think of is a loose slipping belt trying to drive the alternator pulley at idle rpms'.
That will tell you if your dash gauge is accurate or maybe your alternator is kaputt.
Only other thing i can think of is a loose slipping belt trying to drive the alternator pulley at idle rpms'.
04-24-2017, 12:52 AM
#24
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Year: 1997
Model: Cherokee
Engine: 4.0L
You should never disconnect the battery with the engine running on a computer controlled vehicle. The battery acts as a buffer for the alternator. Without the battery, the voltage regulator spikes (ive read as much as 150v) and you run the risk of frying the computer, among other things. And no, the voltage regulator may not be fast enough to stop it.
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