Question about 1998 Ford Expedition

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Discharging replaced altenater twice and battery still discharges when running preformed test from haynes manuel all checked out good also had battery and altenater rechecked twice everything checks out good can you help!!!!

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  • bobwebster99 Feb 10, 2009

    vehicle discharges battery very fast...2 alternators replaced, voltage regulator replaced, 'brain' replaced....92 ford f150...must be more electronics fouled up somewhere

  • Anonymous Mar 28, 2014

    battery discharges overnight



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Replace the drive belt and if you have a keypad on the drivers door and it has been used alot they get shorts in them and will drain the battery so have that tested as well

Posted on Jan 18, 2009


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Hi there, I have an Isuzu trooper 1999. It keeps discharging the battery. When i start the car and take out one of the battery cable the car turn off. I took out the alternator and get it check at...

taking a cable off the battery while the engine is running is a guaranteed way of killing the alternator . The alternator has not been checked properly as it has to be on the vehicle to test all the cables and regulator. If the battery was tested with a multimeter then it has not been tested correctly as it is done with a load tester to determine if the battery is capable of holding a charge under a discharge load.. Batteries can discharge internally as well as from a current flow though a completed circuit Ie-glove box light on --boot light on -- door light on relay coil shorting out . Take it to an accredited auto electrician and have the work done properly as it saves a lot of heart ache.

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I have a 97 galant that keeps blowing the 100 amp fuse? alternator tested good twice checked wiring reads good is there another fuse ?

Usually that fuse powers the alternator and the fuse box.
It would have to be a big short to ground to blow that fuse.
Its possible the main wire to the alternator is touching a metal spot, or the alternator is shorting out inside when it is running.
What is draining the battery may be something else, or the battery could be discharging after the fuse blows if the alternator is not charging it.

Apr 15, 2013 | 1997 Mitsubishi Galant

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New altenater relay and battery evenually needing jump

only two things will cause a battery to discharge bad alternator and a bad battery

Sep 23, 2012 | 1997 Cadillac Seville

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Going down the road runs great then starts loosing charge sit awhile and push off runs great. put new altenater on it i can reve motor up if running lights and starts running good

Either have a bad battery, sometimes they go bad and the symptom is a "self" discharge that will run it down in a few days..
You have something inside the car that's running it down.

The way to check is to unhook the battery for the time that its down and see if the battery is dead when you return. If the battery goes flat unhooked, you have a bad battery. If the battey holds its charge while unhooked you have a drain from the car.

Your car I think was bad about one of the cooling fan relays sticking "on". Just something to be aware of.

Jun 06, 2011 | 1984 Porsche 944

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Battery light is on...alternator showing low voltage

I never condem an altenater till I have the battery at full voltage.Make sure the battery hasa good 30 minute slow charge then load test it.If it is good most likely bad altenater.

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1 Answer

Battery keeps discharging and the altenater and starter are fine.

Some thing is draining your battery, most probably it is the air condition or the short circuit.


Jul 21, 2009 | 2003 Chevrolet Tahoe

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