Question about 1984 AMC American Motors Eagle

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My 85 amc eagle wont charge

Does this car have the voltage regulator inside the alternator, and how many wires run to the alternator

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bibleman01
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SOURCE: i have an 85 amc

you need to put a chevy alternator with a built in regulator on it.
You need a 3 wire alternator. Two wires go to the battery and one wire goes to anything connected to the ignition switch.

Posted on Dec 15, 2008

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Where is the voltage regulator located on a 92 eagle summit


It's inside the alternator. Yes, it can be replaced. I have swapped a used one into my alternator before, it is easy to do. If the alternator just needs replacement, I recommend upgrading to a higher current output model, like the 90 amp alternator off an Eagle Talon. They are same size physically and no modifications need to be made; plug and play.
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Go to the AMC Eagle Den and sign up for the forum, then ask this question there. Great place if you want to keep your Eagle up!
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measure battery voltage while engine running good is 13V to 14V then over charging is 17V to 18V DC
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The voltage regulator is built into the alternator. Does the alternator bench test ok ?

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DOES THE FORD TAURUS HAVE A VOLTAGE REGULATOR


Every car ever made has a voltage regulator

The alternator is just that-- AC Current that is rectified
to DC-- to run the car & charge the battery

Just about every car for the last 40 years has the
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How it is controlled varies from manufacture,make,
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Bad voltage regulator. Usually built-into alternator.
Start car and unplug battery, if it dies your alternator is dead. Get new alternator. If car keeps running, get a voltmeter and check voltage coming through - should be higher than 12v but less than 18v. Any other number means your voltage regulator is dead, cheaper to get a new alternator.

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Alternator wont charge batteries


I can't give you more than generalities without knowing your vehicle model.
The alternator has several connections: Battery charge, Battery sense, and Field. The charge wire carries charging current to the battery. Since there is a voltage drop across this wire, a separate sense wire feeds the actual battery voltage back to the regulator module inside the alternator. The regulator then controls the current going to the Field terminal (a winding inside the alternator), which in turn controls the charging current. There may also be a separate Ground wire, but usually the alternator frame is supposed to be grounded through its mounting bracket.
The first thing to do is check each of the terminals for corrosion or loose connections. In particular, if the alternator has recently been serviced, or if somebody was working near it, check ring terminals on threaded studs to see if they have been left loose. Make sure the connections are clean and free of corrosion or arc burn oxidation, especially at the battery. Make sure screw connections are snug, but do not over-tighten - you don't want to break the connector stud.
If the connections and wiring look good at both ends, check the voltages on the terminals. The charge terminal voltage will be slightly higher than the sense voltage. The difference will be proportional to the electrical demand on the system. The field voltage will show a larger change with load (e. g., it should increase significantly if you turn on the headlights). Voltages must be measured with the engine running, so be very careful not to get the test leads or yourself caught in the alternator belt.

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1 Answer

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SOUND LIKE ALTERNATOR FAULTY.HAVE VECHICLE BATTERY CHARGED OR JUMPED STARTED.WITH ENGINE RUNNING CHECK BATTERY VOLTAGE WITH ENGINE RUNNING SHOULD BE 13.5 - 14.5 VOLTS. IF NOT ALTERNATOR VOLTAGE REGULATOR FAILED.BUT FIRST CHECK ALTERNATOR FUSE AND CHECK ALTERNATOR BATTERY FEED WIRE AND VOLTAGE REGULATOR WIRES FOR DAMAGE OR LOOSE CONNECTION.WHEN YOU TAKE OLD ALTERNATOR TO AUTO PARTS STORE LET THEM TEST ALTERNATOR FIRST.MAKE SURE YOU DONT HAVE ELECTRICAL WIRING PROBLEMS IN VECHICLE.

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My battery to my 84 chevy caprice is not charging. i got a new batery and altenator but it still wont charge.i have to jump it off to get it to start. i dont even know where the voltage regulator is...


the voltage regulator is built into the alternator,have you check the alternator connector for damage or corrosion check with a test light for voltage at the red wire that plugs into the alternator that is in the 2 wire plug connector as well as check the large red wire for voltage as this wire is the feed wire from the battery.you don`t say if this is a new or used alternator.if you have a voltmeter that is the best way to check for the proper amount of voltage at the test sites.the battery must have a minimum of 12.6 volts to start with higher is better.to test the voltage regulator need the engine running and you need a voltmeter to tell properly if it is working.at the back of the alternator their is a hole that looks like the letter D this is where you use something like a cotterpin and insert it into the hole you should feel a tab,push lightly on the tab and ground the cotterpin to the side of the alternator using the voltmeter you should see the voltage start to rise and hear it start to charge.the battery voltage and the feed wire at the alternator as well as the smaller red wire at the plug connector should be the same.charging voltage should be about 14.5 volts.

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1 Answer

I have an 85 amc eagle, I cant get it to charge, it did not have an alternator when i bought it, i have a ford alternator on her now, but wont charge, does this car have the voltage regulator built in the...


you need to put a chevy alternator with a built in regulator on it.
You need a 3 wire alternator. Two wires go to the battery and one wire goes to anything connected to the ignition switch.

Nov 21, 2008 | 1984 AMC American Motors Eagle

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