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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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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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.

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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?


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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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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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ck your alternator if you have one large white wire and two smaller dark wires you've got an internal regulator the entire alternator needs to be replaced if bad

a simple voltmeter you can still buy at radio shack will tell you in about 30 seconds

set meter for dc volts 25 volt scale place red probe on battery positive and black probe on battery negative note reading on voltmeter (11 to 12 volts) start truck/car at idle reprobe battery same as before volts should come to about 12/13 have someone give a slight throttle to engine volts should come to 13.8 volts and stay there never going over this if any volt reading was not as described Yep your voltage regulator/alternator is bad

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How do you check to see if an alternator is working? I checked the battery and also when the car was running and there wasn't any difference in volts. How can I check at the alternator? The alternator has...


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Alternator will not work properly


you might have them check and se that you are getting the right alternator.it 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

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