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Is there a fuse between the alternator and battery? i just put a new bat. in and got stranded charged bat. and died again so im thinking alt . is bad! any help would be greatly appreciated

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  • 32 Answers

I would test the alternator before replacing it. It would most likely be the alternator if you have replaced the battery. If you remove the alternator you can take it to most part stores and they can test it for you.

Posted on Sep 11, 2010

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1 Answer

New battery not charging after changing the alternator


First make sure both battery cables are free of corrosion and ground is secured to chassis and engine then check to see if theres an alt. fuse or bat. fuse blown. Another way to test charging sys w\out an meter is to remove the ground terminal from the bat. with the car running, if the alt. is good car stays running, if all else fails take the alt and bat to a parts store that will test them for free

Dec 14, 2013 | Chevrolet Venture Cars & Trucks

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Bad eld wire or ecu?


Sounds like the alternator is charging, but the extra voltage is not reaching the battery. You should have battery voltage on the large wire at the alternator with the engine off.
If not, that wire is fried or a fuse is blown.

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97 Chevy Blazer, battery and alternator good...dies all the time


in line fuse able link could be blown ,if alt is working fine and bat good i sugest you look closer at wire that goes betwen them and ground wires from moter to bat, motor to body and vise a versa

Dec 05, 2011 | 1997 Chevrolet Blazer

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Put in new alternator,shows charging and battery holding charge but battery light stays on. You start car and light stays off for about 15 to 30 sec. than on.


The alt should charge at around fourteen volls , any ways, yogi need to put another battery. A weak alt will kill a good bat.and vise versa

Aug 30, 2011 | 2003 Ford Taurus

1 Answer

Got new head gasket installed-not related to prob.after that bat.went dead,new bat and alt. still drains bat overnight. could it be a short in starter?


Check the main alternator fuse. It is either a block fuse in the fuse box under the hood or it is built into the positive battery terminal. If it is blown your battery will not charge even though everything else is in perfect working order and the alternator light(charge light) on the dash will not light up to tell you there is a problem. You will drive a short distance and the battery will go dead. After recharging it will start right up run OK till it runs out of juice again and dies, etc. Find the fuse and check it is not blown. It is a frustratingly simple fix to a hard to diagnose problem.

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Light stays on . i have a new alt and new battery and new wire leading from battery to starter to alt. if i disconect the battery the car dies. the alt was bench tested and puts out 15.1 volts yet wont...


Check the drive belt tension and wiring connection at the alternator and at the battery. Check for a blown fuse in the fuse block . -hope this helps

Feb 24, 2010 | 1985 Cadillac DeVille

2 Answers

My battery is new and died after 2 days jump starts the battery comes back to life 2 more days same story again and again.......thanks


Is the alternator charging it ? Do you have a light on in your dash : " ALT" or "BAT" ?
Check cables connections for corrosion also.
Please let me know.

Feb 12, 2010 | 2004 Jeep Grand Cherokee

2 Answers

I'm driving down the road and my truck dies, i'll jump start it and it goes for a couple of blocks and dies again. i've had the alternator and battery checked and they say they're both ok. any suggestions


It could be that you are loosing a connection to main power on fuse panel but it is unlikely. In most cases if this is happening it is because the alternator is not charging. I know you will say you have had it tested but most testing procedures do not load test the alternator and does not show the amperage output of an alternator, they show voltage. In most cases there is not enough to back up the rate of charge and run the car so it dies again...

Aug 28, 2009 | 1986 Nissan Pickup 4WD 1986

4 Answers

Put a new alternator in 2000 Jeep Grand Cherokee engine light on


well , the ECU runs the alternator. (DG wire "dark green")
the alternator field is controlled 100% by PCM reg , inside PCM.
so..... if the running engine has 13.3, to 15vdc the alt is working
if lower, its not. (rpm on engine 800 or more)

not scanning the PCM a the CEL glow, you missed the boat.
why not scan it. see why the PCM is upset (DTC errors stored)

see the 2 lower pins below , those go to PCM.
in theory if the field in the old BAD ALT, was shorted.
that could in fact, burn up the PCM regulator.
shorting outputs of PCM , does that in most cases.
im the poor sod that fixes PCM's.so....

1946421-gyllgess1dmtl30sgxtyvqv2-3-0.jpg

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1 Answer

New alternator and battery battery light stays on and car dies


Have you checked the alternator fuse? The regulator needs power from the fuse to turn on the alternator. The old alternator could have blown the fuse.

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