90 XJ Battery Gauge

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Jun 10, 2014 | 06:49 PM

NorCalTrash

Thread Starter

Newbie

Joined: Mar 2014

Posts: 2

Likes: 0

From: Fort Hood

Year: 1990

Model: Cherokee

Engine: I-6 4.0L

90 XJ Battery Gauge

i have a 90 XJ recently the battery gauge went down to the red so i went and bought a new battery. when i put the new battery in the battery gauge stayed in the red. i was wondering if anyone has any ideas whats going on or how to fix it. thanks in advance

Jun 10, 2014 | 07:12 PM

Ant.

Member

Joined: Aug 2013

Posts: 217

Likes: 1

From: Davie, FL

Year: 1999

Model: Cherokee

Engine: 4.0

If you have a Volt meter you can check to see what the alternator is putting out..

With the jeep running see how many volts are going to the battery..

Ant...

Jun 11, 2014 | 08:02 AM

Nick-B

Seasoned Member

Joined: Jun 2011

Posts: 319

Likes: 3

From: Key Peninsula, WA

Year: 1997

Model: Grand Cherokee

Engine: 4.0

Pull the gauge cluster and clean all the contacts with a big pink pencil eraser.

Jun 11, 2014 | 08:14 AM

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,578

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

TEST the alternator output.

Jun 12, 2014 | 01:09 AM

5-90

CF Veteran

Joined: May 2008

Posts: 3,018

Likes: 23

Year: 1988

Model: Cherokee

Engine: AMC242

Find my writeup on testing primary electrical (it should be in OEM tech - I don't have a link handy,) and go through it.

The RENIX IP is a notorious liar. I use it more for "relative state-of-charge" than anything else, it's calibrated with a grease pencil.