Question about 1989 Jeep Cherokee

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Voltage regulator My battery is reading in the red zone-I'm assuming it's the voltage regulator. I can smell hot wires and when we unhook the battery when the jeep is running-everything gets way more power ie. heater -and the battery reads off the charts. Where is the voltage regulator on a 89 jeep cherokee laredo?

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It's in the alternator,the easiest way to fix it is to replace the alternator.

Posted on Dec 28, 2008


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2012 Jeep Grand Cherokee Battery light comes on randomly .... new alternator new battery ... Light still coming on , today dealership says melted battery harness wire How can this be ?

from a faulty voltage regulator
a voltage regulator controls the voltage to 14.5-14.8 volts and the maximum current is set by the windings in the alternator
if the voltage is uncontrolled , so is the current produced
also melted wires comes from dead shorts that are not fuse controlled

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1989 dodge 250 the red ignition wire is getting hot and melting in two when the key is turned to the run position

Blue wire to ignition switch,from alternator voltage regulator.( 12 volts ) ECU power wire, Red wire to battery terminal. Blue wire goes from alternator to the ignition switch. The voltage regulator senses the incoming voltage from the blue wire. ) it grounds the green field wire This energizes the alternator field, and the alternator begins to produce a charge and sends it to the battery via the main output wire. When the voltage regulator senses 14 volts from the blue field wire, it cuts the ground to the green field wire. Good-Day!

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Blend doors control flow between hot and cold airflow . In a dual system both sides have their own separate blend doors . Possible bad switch, connection or wiring that need checking out .

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1996 Chevy Beretta won't charge battery

Let the car run for a little while. The battery will read lower after starting because it just pulled power out to start the car. If battery light comes on or the voltage keeps dropping trace all wires and make sure connections are tight. I would think that a 95 model car would have an internal voltage regulator but if not find it and replace it. But be sure to unhook the battery first or you will short the new regulator out too.

Jun 11, 2012 | 1996 Chevrolet Beretta

1 Answer

Car wont start, battery dead, new battery and new alternator when we unhook the positve cable the car dies instancly. where should we check next?

start the engine and connect a tester to measure voltage between the terminals of the battery you should read more than 13.5 volts. If it's under that (ex. 12v) then the alternator doesn't work no matter if it's new if it's under 13.5 volts it's ruined. Assuming that the alternator regulator it's incorporated in the alternator cause if it has an external regulator, that's where the problem is.

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I have a 1984 dodge D150, not charging, battery is good,charges with charger\r\ntruck starts and runs pretty good,but is running off of battery, NEW altenater,regulator,and belts belts are tight,replaced...

The first thing you need to do is stop wasting your money by replacing parts. Then get a volt-ohm meter and a test light to test the circuits between the battery, the alternator, the ignition switch, the starter relay and the voltage regulator. (a.k.a. Charging System Circuits)

To start, the "B+" or "BATT" terminal on the alternator (large black wire) MUST have a solid, direct connection to the battery. Check for the proper voltage here. Then, the red wire on the alternator at the "F2" terminal should be HOT at all times. If not, you probably still have a bad fuse link that you missed. The "F1" terminal on the alternator (Light Green wire) is known as your "FIELD" wire. It comes from the "IG" terminal at the voltage regulator. It should be hot any time the key is in the ON position. If not, your voltage regulator is not working or your ignition switch is not providing power to the regulator. Finally, The "F" terminal (Red wire) at the regulator should be hot any time the ignition switch is in the ON position. This actually gets it's power from the starter relay, which gets its power from the ignition switch.

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Alternators not charging changed alternator and battery checked main power wire its good where does the small red and green wire go to off the voltage regulator

the red wire is the power, the grren wire is your signal wire. the green wire sends the signal from the regulator to the ecm to tell it when to cycle the alternator on and off. you could have a faultyy regulator or signal wire causing the malfunction. the wires join the main harness after the regulator.

Apr 05, 2011 | 1999 Mercury Cougar

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My jeep has a alternater problem. I got a new alternater but it is not getting any voltage though it. The battery is new but It is not getting the right amount of voltage.

You have a break in the line somewhere. You need to test the circuit with a voltage meter. You should be able to find the dead zone on the wire. Just splice it and it should fix it. It is on that circuit, you know that. Just test them from the alternator to the battery. You will find the break. If you need anything, let me know. I am here to help in anyway I can. Thanks for choosing FixYa.

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Alternator will not work properly

you might have them check and se that you are getting the right could also be because of the battery not pushing enough volts back to the alternator that is keeping the reading off. have the battery tested and see if you have a dead cell or low reading on it

Jan 22, 2009 | 1991 Jeep Wrangler

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