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911 doctor Posted on Jul 31, 2017
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Alternator problem,battery light came om a year ago,i have tested the output .At that time it was ok 14.2 volts so i have replaced the battery.But this problem is back and on for a year.Charging sometimes up to 30 volts.So i have replaced the alternator and at first no charge that in 10 min 13,8 volt but later up to 24volts. Is there an external voltage regulator on these alternators? Any idea would help

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Russ Hill

Russ Hill

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  • Smart Master 4,057 Answers
  • Posted on Jul 31, 2017
Russ Hill
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Joined: Oct 22, 2012
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Check the earths on the engine and the shell, usually do this if the earth id not good. regulator is built into the alternator. no others needed. depending on the voltage stated on alternator should be 14v plus minus 2. battery should be 12.06 or 8 if brand new,

3 Related Answers

Anonymous

  • 958 Answers
  • Posted on Jul 26, 2008

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..

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Anonymous

  • 21 Answers
  • Posted on Apr 17, 2011

SOURCE: alternator problem,battery light came om

check your battery

A

Anonymous

  • Posted on Jun 15, 2011

SOURCE: alternator has intermitent no output voltage 11.--

Only a guess,but you could put a voltage regulator
in it,if you can find one

You may have a generator repair shop that will sell
you one,or try an auto parts store

Unfortunately the days of the 1960's thru 1980's have
passed us by.

Now you get punished with a questionable
rebuilt, for several hundred dollars

Check ALL ground wires in the engine compartment
& I mean any wire or battery cable

Remove them & clean all of them

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Related Questions:

0helpful
1answer

Can alternator put out 14.2 volts but not enough amps to charge battery and turn off dattery light?
Yes and no.
It sounds like you have a wiring problem.
The alternator output could be 14 volts and only one or two amps, but that would be enough to kill the warning light. Its more likely the alternator is charging but the current is not reaching the battery.
Read full answer
Aug 26, 2014 • GMC Envoy Cars & Trucks
2helpful
2answers

Lights dim at stop and brighten on go
I think the battery is shot

Is it over 5 years old replace it
then test the alternator output

Doubt the alterntor is bad the battery
won't hold a charge that is why your
lights are so dim,too much resistance
in battery cells
Read full answer
Jan 22, 2013 • 2002 Toyota Sequoia
0helpful
1answer

Alternator problem,battery light came om a year ago,i have tested the output .At that time it was ok 14.2 volts so i have replaced the battery.But this problem is back and on for a year.Charging sometimes...
check your battery
Read full answer
Apr 17, 2011 • 2008 Smart fortwo
0helpful
1answer

Alternator problem,battery light came om a year ago,i have tested the output .At that time it was ok 14.2 volts so i have replaced the battery.But this problem is back and on for a year.Charging sometimes...
already answered
Read full answer
Apr 17, 2011 • Smart fortwo Cars & Trucks
0helpful
1answer

I have a 1996 Nissan Maxima. The altenator and battery have been replaced less than a year ago. It still will not start with out a jump in the cold weather. .
Have an auto electrician CHECK ur HARGiNG system! Either ur battery got problem or the alternator! Alternator should have 13 to 14 volts output while running! Taah!
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Nov 09, 2010 • 1996 Nissan Maxima
0helpful
3answers

When the Jeep was new the volt meter read 14 volts....now the volt meter reads 13 volts with a one year old battery. Since the battery is a 12 volt battery should there be any concern that the volt meter...
It needs to be looked at,hook a volt meter to the battery,and start the engine,turn the ac on high blower,and the head lights on,the alternator should be putting out 13.65 volts to 14.25 volts,if it is any lower than this,replace the alternator,now,if the reading is not the same as in the vehicles volt meter,then the cables,positive and negative need to be replaced,the cables get old,and corrode on the inside and break down,they do not carry the current as they should.Shuold you decide to replace them,go with a larger diameter cable,both positive,and negative.
Read full answer
May 28, 2010 • 1996 Jeep Grand Cherokee
0helpful
2answers

Alternator light on dash is on, but very dim. alternator putting out 11.90 volts when running. dash lights behind gauges stopped working at the same time as alternator light coming on. there is a little...
alternator voltage output should be between 13-14 volts. get your alternator tested at your local part store
Read full answer
Feb 23, 2010 • 1989 Jeep Comanche
2helpful
1answer

What is the expected output of a alternator in a Jeep 4.0L Sahara (yr. 2000)? My Jeep's ''check gauges'' light came on, and the battery gauge dropped to nothing. Checked the alternator (with a voltage...
You shoulld expect more than 12.8 volts from the alternator up to nearly 14 volts when charging a low battery. The battery can only show the amount of voltage your alternator is sending to it after being used for a while. I would suggest that you have the battery tested & recharged completely, your voltage will be above 12 volts and if it returns to below that , you will know your alternator is not charging. Also, if you test the output of the alternator and see it is below 12 volts after the battery is fully charged at 12+ volts you will have confimed the problem also.

good luck.
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Jan 31, 2010 • 2000 Jeep Wrangler
0helpful
2answers

Replaced alternator on a 2002 ford taurus, still showing low voltage engine light still coming on
You have to test the alternator output, should be about 14 - 16 volts.

Test your battery too, fully charged battery should be about 13 volts.

If these check out ok, the problem is the sensor or the wiring in the sensor circuit
Read full answer
Jul 01, 2009 • 1999 Ford Taurus
0helpful
2answers

Low volts light stays on
new altenator or junkyard one.if new return it, if junkyard just ignore light as its odds on they will not change it .the red light is caused by the difference in the voltage between input and output voltages .Quick test --start engine and run at 1500rpm disconnect battery and turn everything electrical on and if engine stops then change altenator if it stays running then altenator is OK
Read full answer
Jan 17, 2009 • 1998 Lincoln Town Car
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