Question about 1994 Honda Accord

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I have checked the intermittent battery discharge problem with 3 new batterys, alternator, wiring check and more. I am baffeled. I need you geniuses to think.

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  • Thomas Tabron May 21, 2009

    Thank you MNfisherman you hit it right on the nail. I forgot all about the voltage regulator thank you very much.




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VOLTAGE REGULATOR may need replacement.

Posted on May 13, 2009


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2 Answers

Brand new battery and alternator but keeps turning off. I have to keep jumping the battery. What's wrong?

Check the alternator output with a multimeter. You should get14volts out of the alternator (I purchase brand new alternator and sometimes there no good), it happens, check the big wire coming out of the alternator, if you dont get at lease 14volts it's no good (it's got to generate more than 12volts).good luck.

May 15, 2016 | 1995 Toyota Corolla

1 Answer

1999 Toyota Avalon battery discharge light and abs light intermittent. Changed battery and alternator no change to issue. Checked voltages with multimeter 12.73 with car off and 17.03 with car on. Ple

17v on is bad. its too high.
are you using a good voltmeter. a DMM, ? or relic analog meter.?
you put a new alternator in the car? not from autozoned i hope.
the wiring to the Alternator must be all good, them includes the case ground and battery cables, end to end, good and tight and not corroded.
the regulator is inside your ALT>
the ALT has 5 connections 1 is ground. any bad, reg can go nuts.
newer cars , go less nuts. they detect more errors and shut down
your is overcharging and will burn a battery up in no time.(heat)
Grounds good.
idiot lamp ,must be there, an working or alt may start up dead.
the lamp creates excitation currents, to boot up ALT.
wire B, goes to battery via fuse link, if this big wire fails. all bets off.
wire IG goes to 7.5A gage fuse, it must not be blown.
wire S, (sense) is 5amp ALT-s fuse, this senses battery voltage
if this wire drops in voltage the ALT will go to max. (or shut down)
toss coin there, lots of regs sub'd out in so many years, and rebuilts.

the regulator is not working right.
that means 3 things.
1: reg is bad.
2: reg is being lied to. (bad wires) even bad battery.

Jan 10, 2014 | 1990 Toyota Pickup

2 Answers

We have an 2000 mpv . got a new battery which went dead after one year now the new battery also has gone dead the alternator was replaced and we are wondering if we bought the correct size battery

well normally the manufactures would list a battery type in your manual or the manufactures of the battery has a catalog with the different vehicles and the recommended battery..

things to check..

1.) look for a surface discharge meaning that some stuff on the vehicle is pulling more power than it should or some device isnt shutting off properly, like the trunk light or door lights etc..

2.) check that the alternator is pushing 14.2 volts to the battery ,, around 13.6 to 14.5 is fine any more or any less will greatly reduce battery life, this can be caused by defective wiring as well so have that checked

3.) if you have an amplifier that isnt cutting off properly well that can cause this as well by greatly reducing battery life. if you have an amplifier you would need a bigger than slandered battery and in some cases alternator upgrades..

Ok points when buying a battery..

1.) buy a battery that has the longest warranty period you can get,, If its prorated its just like not having any warranty..

2.) Buy Spectype (OEM), or brand name ones like AcDelco, Die Hard, Bosch etc..

3.) Go with a slightly larger battery if you car needs 550cca (which i think it does) go with 850cc or around that, this helps if you have a surface discharge and basically prolongs life..

Jan 11, 2011 | 2000 Mazda MPV

2 Answers

1987 f-150 ford pickup.discharging problem.replaced the alternator and it still alternator has been check and is working

check that its not a duff battery first,,, then take off or undo battery over night if its still flat its your battery

Nov 28, 2010 | 1987 Ford F 150

1 Answer

Just installed a new alternater and the battery gadge is reding discharge I had the battery checked and its good. Can you help

Check the 'Bat' / 'Charge'/ 'Alt' indicator on the dash panel lights when the vehicle ignition is switched on prior to starting the engine.
This indicator should extinguish within approx 1 second of starting engine.

If the indicator is not operating the alternator cannot provide charge current - check:-
1) the wiring connections to the new alternator,
2) the indicator lamp is not blown,
3) the alternator is properly grounded.

If the indicator light works normally, check the output voltage of the alternator is approx 14.5v when the motor is running.
If its about 14.5v, the battery should be charging.

Aug 12, 2009 | 2003 Chevrolet Tahoe

1 Answer

Vehicle cuts out while driving and wont turn on replaced

Have you seen any warning lights on the dash come on? My nephew had a short in one of the wires going to into the plug for the alternator. The alternator was only charging intermittently. The car will run until the battery is completely discharged and then you are stuck. Have the alternator checked again and move around some of the wires at the plug and see if it effects the alternator output. I ended up soldering the wire that was shorting out into the plug. Batteries can also be deceiving. Just because a battery seems to take a charge, if there is a cell shorting out, it is only a matter of time before the battery discharges. You may want to put a different battery into the car that you know is good and see if that makes a difference as well. Hope this helps some and good luck. I hate electrical problems.....what a pain!! lol

Jul 07, 2009 | 2002 Dodge Stratus

1 Answer

Battery discharge intermittently with brake light coming on too

Check all wiring connections to alternator and battery to insure all are good, if ok it will most likely need an alternator.

Nov 30, 2008 | 1990 Toyota Pickup

1 Answer

2000 kia sportage charging.

hi check the main alternator charigng wire the comes out of your alternator see if it is sending a 14v no less reading on a multimeter if not replace the alternator if so go to your battery see if the multimeter readings are the same as the alternator if so do a battery discharge test if not trace the path of the main wire which comes from the alternator to the battery for breaks and all connections yates210456

Sep 24, 2008 | 2000 Kia Sportage

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