Alternator/charging issue

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Apr 10, 2014 | 08:09 AM

liftallthejeeps01

Thread Starter

Newbie

Joined: Dec 2013

Posts: 4

Likes: 0

Model: Cherokee

Alternator/charging issue

Hey guys ive been having an issue with my charging system.the other day I was driving and my check gauges light came on and my voltage gauge went all the way down. But nothing was going wrong except that. Every time I would shut it off and start it back up the gauge would start at 14 then after a minute or so of driving it would happen again. Finally 2 days ago it went for good and I had to jump it and limp it home... ive since went and got the alternator rebuilt and for the first day after that it was fine. Then yesterday I was driving for about the first minute again and the check gauges light came back on and the voltage gauge dropped all the way down again. Does anyone have any idea what could be wrong now

Apr 10, 2014 | 08:18 AM

93gc40

CF Veteran

Joined: Mar 2009

Posts: 2,750

Likes: 3

From: Visalia, Kalifornia, ussa

Year: 1996

Model: Cherokee

Engine: 4.0

Did you have the battery tested? Have you check the grounds and other battery connections? You may have a ECU failing.. The voltage regulator and power distribution is a function of the ECU.

Apr 10, 2014 | 08:23 AM

kjc

CF Veteran

Joined: Aug 2011

Posts: 1,031

Likes: 4

From: Blue Springs, MO

Year: 1993

Model: Grand Cherokee

Engine: 4.0L Laredo

Did you charge the battery? Get it tested? I believe the alt voltage is regulated by the PCM, so you might have an issue with that. I'd put a volt meter on the battery and make sure it's 14+ volts. You should probably clean all the grounds.. especially the battery cables.

Maybe that's the ECU where I said PCM

Last edited by kjc; Apr 10, 2014 at 08:25 AM. Reason: oops

Apr 10, 2014 | 09:07 AM

liftallthejeeps01

Thread Starter

Newbie

Joined: Dec 2013

Posts: 4

Likes: 0

Model: Cherokee

I do wheel with the jeep do u think the pcm could be failing from getting wet... never tested the battery and the belt is pretty beat up could that have anything to do with it. Could it be a blown fuse or something of that nature

Apr 10, 2014 | 09:39 AM

C H E R O K E E 98XJ

Seasoned Member

Joined: Oct 2012

Posts: 414

Likes: 3

From: Minnesota

Year: 1998

Model: Cherokee

Engine: 4.0 Liter Inline 6

I would definitely check the battery cables and terminals. Same thing happened to me. I checked the cables, seemed good but the terminals were a tad corroded so I disconnected and cleaned cable ends and terminals with steel wool real good and it hasn't happened since. (knock on wood)

Apr 11, 2014 | 04:44 AM

liftallthejeeps01

Thread Starter

Newbie

Joined: Dec 2013

Posts: 4

Likes: 0

Model: Cherokee

Thanks guys fornthe help I figured out what it was it was a bad rebuild on the alternator I took it out and brought itnthe the guy that rebuiltnit and he opened it up and there was anbrush inside thatbwas hanging up. She's charging at 14.5 steady and not shutting off after the first minute.