1998 XJ voltage reulator

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Apr 9, 2018 | 06:20 PM

ccouvillion

Thread Starter

Newbie

Joined: Sep 2017

Posts: 18

Likes: 0

From: Porltand Oregon

Year: 1998

Model: Cherokee (XJ)

Engine: 4.0

1998 XJ voltage reulator

My jeep is intermittently check gauge light comes on and it shows it not charging, I had it tested twice at different autozones and they say it has a bad voltage regulator. On my 1998 is it located in PCM or internal in alternator ?

Any help would be appreciated

THANKS

Apr 9, 2018 | 09:00 PM

PatHenry

CF Veteran

Joined: Nov 2017

Posts: 3,700

Likes: 238

From: Groton, MA

Year: 1995

Model: Cherokee(XJ)

Engine: I6 4.0L

PCM - make sure the part number is -exactly- the same if you replace it.

Apr 9, 2018 | 09:09 PM

tech

CF Veteran

Joined: Jun 2016

Posts: 2,138

Likes: 278

From: Santa Clarita California

Year: 2001

Model: Cherokee (XJ)

Engine: 4.0L

Before you change your PCM check the wiring to the alternator it could the problem . How old is your alternator ? it could also be working intermittently .

Apr 9, 2018 | 09:12 PM

BlueRidgeMark

CF Veteran

Joined: May 2012

Posts: 7,965

Likes: 964

From: Lost in the wilds of Virginia

Year: 1998 Classic (I'll get it running soon....) and 02 Grand

Model: Cherokee (XJ)

Engine: 4.0

Before you spend money on a new PCM, try cleaning up your battery cables. All of them, both ends.

The PCM grounds to the same plate as the main battery ground to the block, just forward of and below the distributor.

Bad grounds can do lots of strange things. It's just good maintenance anyway, and it might cure your problem.

If it doesn't, well, it didn't cost much.