Question about 1997 Jeep Wrangler

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I have 97 Wrangler when running to battery gauge will drop to nothing within a second and lights will dim slightly has no problem restarting

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Check the voltage regulator on alternator

Posted on Oct 01, 2009

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Sounds like you either have a loose terminal to the battery, or you have a bad alternator. Usually if you are loosing power while driving it is the alternator cause you are using alot of electricity. Or you can take battery in to get it checked but I dont think it is a battery. Good luck

Posted on Oct 01, 2009

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I have 97 Wrangler when running the battery gauge will drop to 0, if I continue to drive it will not start when i turn it off and resttart it. i have a new battery , the alternater is fine took it


It still sounds like an alternator issue when the vehicle is running you should be showing 14.4 volts going into the battery try a load on the system while checking this means turn everything on the blower the lights 4-ways the A/C everything then see if the charging system can keep up

Aug 27, 2012 | 1997 Jeep Wrangler

2 Answers

I have had the battery & the alternator "shop-tested" (twice) now & they are both "good". My Jeep will run fine for a few miles/ minutes untill "out of the blue" my voltage gauge drops down to...


Your alternator is regulated by the PCM. It could be the PCM or the ignition switch. Might want to try swapping out the shutdown relay just for grins before getting into the ignition switch. Good luck.

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Oct 02, 2010 | 1997 Jeep Wrangler

1 Answer

Instrument cluster on 97 Wrangler


IF YOU REMOVE INSTRUMENT CLUSTER AND UNPLUG IT,PLUG IT BACK IN AND UNPLUG IT AGAIN..DO THIS A FEW TIMES..IT SHOULD CLEAN OFF SLIGHT OXIDATION ON CONNECTOR TERMINALS..HAVE SEEN THIS BEFORE..I ALSO THINK REPAIR CONNECTORS AVAILABLE FROM DEALER

Jun 21, 2009 | 1998 Jeep Wrangler

1 Answer

Alternator or BCM problem ? Gauges drop


it is not the BCM, go to any Kragen or Autozone parts store, have them test the alt, the test is free

Feb 18, 2009 | 2000 Pontiac Sunfire

2 Answers

1999 Ford Explorer- Battery gauge dropps, lights dim, then return


I believe that the alternator brushes could be going bad...if this happens again take your alternator off and take it to an electric shop and have it tested

Jan 21, 2009 | 1993 GMC Sierra K1500

1 Answer

Fluxuation in electrical power


This is normal behavior in Grand Ams. I've had a '97 and a '04 and both did this from day 1. You'll also notice the lights dim/blower slow down more if you press the brake pedal while idling w/ blower on high and lights on; it's just that the alternator on these cars can't output anywhere near full power at idle. (my '03 S-10 also does this). Watch your voltmeter if you have one, when running above 1200 RPM you should see the system running between 13.5 - 14.5 (usually you just have to eyeball this as the gauges aren't well marked, mine are only marked 8 & 18 - should read slightly past halfway). If you're still worried, have someone check the system for you, many places like Autozone or Advanced will do this for free.

Jan 14, 2009 | 2004 Pontiac Grand Am

1 Answer

Oil pressure


i was having the same issue with oil pressure and i only had 55K on mine, i have since changed the cat and the exhaust manifold and the problem went away? might be a coiencedance but it makes since thinking like an exhaust brake would work

Jul 01, 2008 | 1997 Jeep Wrangler

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