Question about 1996 Jeep Cherokee Sport

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Alternator not charging. battery good, where is the regulator in jeep cherokke 96?

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Inside the alternator

Posted on May 10, 2010

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96 dodge ram 2500 diesel turbo good batteries, alternator good.. batteries won't charge

check that the charge rate from the alternator is no ac current. A multi meter will show a charge rate of 13.5 to 14.5 volts but that could be unrectified current because of a failed diode in the rectifier in the alternator. Set the meter to read for ac voltage and if you have ac reading then have the alternator overhauled. Have a load test done to check the batteries for a problem cell under load.

Jul 05, 2014 | Cars & Trucks

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Hola mi cherokke 96 se apaga derrepente. y en ocasiones batallo para prenderla. en ocasiones me funciona abrir y cerrar el switch. si suena la bomba y en la computadora no sale nada.

english , please,
google translated
Hello My Cherokke 96 off derrepente. and sometimes I struggle to turn it on. sometimes I work open and close the switch. if it sounds the pump and the computer nothing comes out.

and which engine is there (number of cylinders, and displacement (size)??????

Jan 24, 2014 | 1996 Jeep Grand Cherokee

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Does jeep nwrangler (1998) 4.o litre with air have a voltage reulator that if bad would stop alternator from putting charge into battery? and where is voltage regulator located?

The voltage regulator it in the ECM.What you need to do is go to the basic which can be overlooked like is the Alternator fuse burnt open that will require a new fuse, how is the battery terminal connection? You need to check that,Or how is the calbe from the alternator to the Battery is the connection in good shape? Those you need to check you mainly need a voltmeter to do this but a good visual inspection can get results,

Nov 23, 2012 | 1998 Jeep Wrangler

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I have a 1996 Grand Cherokee Limited this is giving me fits with the charging system. I've replaced the battery twice in the past 3 months. I've also installed a factory rebuilt alternator. I can drive...

Alternators have a built in regulator that tells them when to turn on and off. Just because the alternator is working, does not mean the regulator is turning it on and off when it should, in turn, over charging or undercharging your battery ruining it. The problem is you could also have a short somewhere that is draining the battery when it gets damp. The starter or a bad battery cable is usually the culprit here. A bad battery cable can mimic a dead battery, and when you jump it you put enough power to allow it to "jump" the bad spot, But also put a major strain on the cars electronics. So start with new cables, a 96 is 15 years old. Inspect the starter for any sign of corrosion or other damage at the same time. If this doesn't help, demand a replacement alternator. 98% of rebuilds are good, but 2% aren't.

Mar 14, 2011 | 1996 Jeep Grand Cherokee

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Battery wont hold a charge. it takes a charge, i drove it around the block, kept it running in park and when i turned it off it wouldn't turn back on.

First, it can damage your alternator to try to charge a dead battery by just driving or running the car. The alternator is designed to maintain the state of charge already in a battery.
Old (pre mid 60's cars with generators could do that).
Have your battery charged and tested. if it checks out, then have the charging system in the car tested. On most newer Jeeps, the regulator is not in the alternator it is part of the computer. If the alternator checks as good but it is not charging, that may be why.
Hopefully you just need a new battery.

Jun 08, 2010 | 2000 Jeep Grand Cherokee

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I have a 1993 jeep grand cherokee. its not charging. i've had the alternator and battery tested they're good. is it the voltage regulator? if so how do I change it? where is it? or can it be something else...

How can the Alt and Battery be good, but not charging? The Voltage Regulator is inside the alternator. Keep out of the Parts Store and take it to a shop and have it checked on the truck. you may have wiring issues.

May 14, 2010 | 1993 Jeep Grand Cherokee

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Have a 98 jeep wrangeler 4.0 need to know how to test it I took it in to machine shop they said it was ok but when I put it back on theres no voltage

Pin #20 (dark green wire) on the computer should run to the alternator field circuit. (be aware...Jeep changes color codes more than I change my socks)
The regulator is part of the computer and is not separately available. When the computer sees low voltage it provides a ground to the dark green wire that causes the alternator to begin charging.
To determine if the alternator/regulator combination is working, put a volt meter across the battery terminals (you need a fully charged and load tested battery to do this) With the engine running and no accessories on, the charge rate should be about 13.5 to 13.9 Not above 14. With all accessories on and headlights on high beam, the charge rate should not drop below 13 (at worst 12.5) and should not ever drop below that regardless of how long it runs.
If it does, and the alternator was already proven as good, then the regulator (in your case, the computer) needs to be replaced.
But, before doing that, check the fuses in the power distribution center to make sure the one for the alternator is not blown. Also make sure that the larger alternator wire has full battery voltage (check at the alternator connection) If there is lower or no voltage there, find out why.
Another thing to check is that all ground connections are good at the battery, engine, firewall and especially at the left fender where the computer is connected. (if the ground wires at the computer are not properly grounded it can't send a ground to the alternator
There is a "work around" where you can wire in an old style regulator but I don't remember exactly what goes where but it will turn the check engine light on and therefore may cause you to fail a vehicle inspection though the charging system has nothing to do with emissions..Therefore, I don't recommend it unless you only use the jeep off road.
Hope this helps a bit.

Jan 30, 2010 | 1998 Jeep Wrangler

1 Answer

96 Jeep GCL wants to turn over, but can't unless ur give gas

To begin with, a 45minute charge is insufficient to fully charge a battery. A "quick charge" can damage the battery by overheating the plates, causing them to warp and shed lots of oxide that falls to the bottom and acts as a short. I've found that charging at 10 amps or less for up to six hours works best. After charging fully, the battery must be load tested (generally a 200amp load is applied and the battery voltage should not fall below 9.5 volts...test is under 15 seconds or it can damage a good battery.)
Next is the charging system. I use a simple but fairly reliable method for doing this. With the car running, place a volt meter on the battery and read voltage with all accessories off. Volts should be under 14 and above 13...generally about 13.5....Then turn on everything electrical in the car. Volts should not be less than 12.9 but 12.5 is OK as long as it does not drop further. After running for about ten minutes, voltage should not creep downward below the 12.5 mark. It may vary as regulator comes on and off but it should not drop. When some shops check an alternator, they "full field" it...this tells you that the alternator itself is able to charge the battery but does not tell you if the regulator is working correctly.
If the voltage is below specifications either the alternator or voltage regulator has or is failing.
On some Jeeps, the voltage regulator is in the computer (I know...really bright) and if it is it cannot be replaced separately. If regulator is inside the alternator you can change it or replace the alternator.
You can also have something in the system drawing down the battery, but from what you wrote, I don't think you have a problem there.

Aug 13, 2009 | 1996 Jeep Grand Cherokee

1 Answer

Battery dont charge

Check all the connections. The battery clamps should be tight. Wires on the alternator should all be tight. Have you watched your battery charge indicator when the Jeep died to see if it was falling below 13 volts?

Apr 17, 2009 | 1996 Jeep Grand Cherokee

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