Question about 1986 Ford Aerostar

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Voltage regulator on a 1986 ford aerostar

Iv been having problems with my van the battery keeps dying went to auto zone said it wasnt the battery or the alternator and possible could be the voltage regulator i bought i but now i cant find the damn thing help please!!!

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  • gerry bissi May 11, 2010

    I'm not certain on 1986, but I think the regulator attaches directly to the alternator, on the back. with 4 screws.



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Also check the left front corner of the engine compartment sometime the battery have to be removed in order to see it

Posted on Jan 22, 2009


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I have a few problems. First my van won't keep a charge. Second my van seems to not be able to go beyond second gear. Next when it was running it would die for no reason.

If it's not holding a charge you could have a bad battery or the alternator is not putting out enough voltage to keep it charged. Have your battery tested at auto zone or advanced auto. Once the battery is ruled out the next thing to do is check the alternator, this can be done with the alternator installed on the vehicle, if you have a digital multi-meter or volt meter you can check alternator out put at the battery. If your D.C voltage reading is more than 13 volts than your alternator is working. Your transmission issue is probably linked to the electrical issue since it is an electronic transmission, and requires a certain amount of voltage to operate properly.

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Test your battery and starter by doing a voltage drop test. Put one test lead of your meter on the neg side of your battery, one on the positive. Check voltage. Make sure that you are actually connecting to the battery itself and not the terminal ends. Should read 12.8-13.2. Keeping the neg in the same location move the pos to the terminal end, engage starter, meter should read above 10 volts. Continue testing down the pos wire to the starter, checking voltage, until you find less than 10 volts. If the voltage is good at starter, have someone turn key to the start position, tap starter with a hammer. if starter engages , replace starter.

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Your Voltage Regulator is bad or your Alternator has an Internal short. Make sure you have a belt on that pulley. If you do have a belt, then the best thing would be to go to any autoparts store and have the Alternator checked. Most of the modern Alternators have a built-in Regulator and most mechanics just switch the Alternator to eliminate the problem.

You may run down the Battery trying to drive somewhere for an on the car test. It is safer to just remove the part if you can not depend on the Van not getting you back from the autoparts store.

I hope my solution is very helpful to you.

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Check all the pullies that run the belt, make sure they all spin free without any looseness or noise. If so, replace the belt.

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goto auto zone or advance auto they'll be glad to print one out for you "no charge".

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You need an alternator, the regualtor is built in to it.

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