90 XJ Battery Gauge

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06-10-2014, 06:49 PM

NorCalTrash

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Join Date: Mar 2014

Location: Fort Hood

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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

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06-10-2014, 07:12 PM

Ant.

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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...

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06-11-2014, 08:02 AM

Nick-B

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Year: 1997

Model: Grand Cherokee

Engine: 4.0

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

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06-11-2014, 08:14 AM

cruiser54

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Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

TEST the alternator output.

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06-12-2014, 01:09 AM

5-90

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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.