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Alternator is overchargin

It chargers to about 17 volts I don't know if it has a regulator or not

Posted by Anonymous on


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  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 958 Answers

SOURCE: Alternator or Voltage regulator

if you can carefully put a metal wrench on the rotating pulley of the alternator and felt a magnetism attracting the metal wrench, then your alternator is charging. if there is no magnetism, then the alternator is not charging...

another test is to measure the voltage on the small wires that went in to the alternator that says "F" for field, it should measure battery voltage...that is the voltage from the regulator..that means your regulator is working...but the altrntor is not..

without that battery voltage, then the regulator is he culprit...

pls be carefull...

hope i was able to solve ur problem..

pls rate me.. tnx, drcool..

Posted on Jul 26, 2008

  • 674 Answers

SOURCE: alternator when warm over charges 16 17 volts is regulator inside

are you boiling your battery?
are you having starting problem?
a shorted battery will cause you alt to charge very hard.

Posted on Sep 24, 2008

  • 5158 Answers

SOURCE: alternator putting out 16.5volts

or and more likely... the voltage regulator either mounted on the alternator or on the wheel well is defective.

Posted on Feb 26, 2009

  • 56 Answers

SOURCE: high voltage

yes. you will need to know the engine size for the exact location. it is usually on the passenger side firewall.

Posted on Aug 09, 2009

  • 21873 Answers

SOURCE: can the regulator be changed without changing the alternator

Depends on the year make and model.
GM cars used an alternator with a built-in voltage regulator since the mid 1970s.

Posted on Feb 21, 2013

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I have a 2001 dodge Durango 4.7 v8. The battery died and the alternator tested bad. I replaced both the battery and alternator. The new alternator within a week stopped working and I replaced it. It was...

it is the regulator that is the problem
a battery will need 14.5-14.8 volts dc to charge and a fully charged battery in good condition will read 13.2 on a multimeter
as you say the regulator is in the ecm so get a good replacement from the wreckers or junk yard or get a reconditioned ecm for those shops that can recondition/exchange

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2002 sonata 2.4l battery dash light on. replaced alternator. Still not charging

I don't know if your car has an integrated regulator or not; some house the regulator in a section of the alternator case, others mount it remote from it. The regulator monitors the load and battery voltag,e primitively but effectively, and controls the current flowing through the field winding of the alternator to ground, changing the magnetic field intensity and consequently the voltage output of the alternator. The 'hot' end of the field is internally connected to the + output, the 'cold' end is controlled by a transistor inside the regulator which, in turn, is controlled by circuitry monitoring the system voltage.     Some alternators can be tested by sticking a wire through a specified opening, actually shorting the controlled end of the field to ground briefly, while monitoring the voltage across the battery, doing this though for seconds only. This essentially bypasses a suspected defective regulator; this causes the output voltage to rise instantly to its maximum of ~17 volts if the alternator is OK.
I don't recommend poking a wire at random into an available opening so having a service manual (Haynes-Chilton) would be nearly mandatory.

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