Question about 2006 Ford Mustang

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96 ford mustang gt charging problem

We have changed battery, alternator, still have a serious charging problem. Battery gets drained, is there something other than an alternator that can be checked?

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  • woodystang Jun 08, 2008

    helpful hints, thanks for all the help.


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  • Master
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I have had nearly exactly this problem in a different car. The starter was the culprit. It was worn down to a point where it was just threshold acceptable electrically and mechanically to turn and do its work. Yet it drained very high amperage during this work. If you have the time, remove the starter and disassemble it. Then cleant the copper commutator thoroughly using ScotchBrite pad, diesel fuel and strong hands.Then ensure the brushes are long enough and brush springs are ok, then clean brushes and holders with a stiff brush and fuel. Then blow dry with compressed air the run a bench test...clamp the starter down and apply a well-charged car battery and an ammeter. It should only draw about 5 to 10 amps steady after startup, but much heavier at startup under load...could be up to 500 amps depending on your bench test....difficult to apply loads here...main point is low current under no load.
A second possibility, other than a wire harness default, is the car's computer has gone bad...try a diagnostic code checker...

Posted on Jun 08, 2008

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  • Ford Master
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Ignition coil not powering right

also some useful info
batterys are refurbed these days and sometimes an unlucky person can still get a dead cell battery several times even if the you bought brand new
i took mine back 4 times before i found a good one that kept its charge
dead cells dont show them selves very well on battery tests even though dead cell the tester would show good show dont think that there is something definatley wrong you could be in same ditch i was before with my batterys
alternator testers at some shops are not reliable enough i recommend a voltage tester to battery

Posted on Jun 08, 2008

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2007 mustang battery drain

Well I hope you located the source of the drain however if you were unable here are a few possibilities: It could be a bad alternator or a faulty wire/switch/relay. Hard to say by the brief problem reference. I've dealt with several electrical gremlins in my 1987 Ford Mustang GT over the years. Try some basic cleaning of battery terminals and cpu ground/engine grounds would be a great start grab a scotch brite pad or better yet a steel wire brush from your local hardware store.Get the terminals/grounds nice and shiny. I do Hope you're able to track down the drain.... P.S. Look at alarm as a Possible drain if one is installed.

Oct 31, 2013 | Ford Mustang Cars & Trucks

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1995 Ford Mustang Battery draining

Check for current leakage.. I suggest you start from the DVD player connection and trace back to the main power supply.
Please let me know the Audio and DVD player Brand and models...

May 16, 2008 | 1995 Ford Mustang

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2006 mustang gt abs light and traction control light come on

First, the battery replacement indicates you have a short. Either something draining the battery, or a bad alternator. This explains the light problem too. Get the alternator and battery tested at a auto-parts store. All the rest will fall in place.

Sep 09, 2012 | 2006 Ford Mustang GT

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2003 mustang gt drains battery in 2 days

03 Mustang GT (Parasitic) Battery Drain Fix
I am seeing a lot of mustangs are having battery draining issues and I wish to share some simple solutions found while working on a friends 03 GT 4.6ltr.

In a quiet area, key switched off, hood up, Listen carefully close to alternator. I heard a high pitched hissing/whistle sound at low volume, came from back of alternator. This sound was the voltage regulator/rectifier staying on when key is off due to faulty diodes inside the voltage regulator/rectifier circuit, can cause battery to go dead after car not ran in about 2-7 days.

After having the alternator tested free at a parts store, test showed alternator was good because the faulty diodes in the alternator did not show up on the test, the machine did not test for faulty drain back issues that were present.
Alternator on-car-fix:

There was battery voltage running at all times through the two-wire connector on back of alternator. Disconnect the battery first for safety and to reduce chance of short circuit. The yellow wire/with white stripe is hot while car is off so I traced this from the 2-wire connector on the alternator then closer towards driver side front fender. Next I cut the Yellow/White Stripe wire, spliced a good connection wire to it and ran it through a hole in the fire-wall to the fusebox(under dash), connected it to a 15a fuse that does not get used but has power when key is turned on but no power when key is off.

The purpose for re-routing the hot wire to the alternator, is to turn off the alternator charging circuit when the key is turned off so it may not run down the battery. I am seeing good results with this fix(or patch) so far. No More Parasitic Battery Drain!

Another fix can be to change the small pulley on the alternator to a larger pulley so the alternator does not spin too fast, putting too much energy through the diodes can cause a charging system to act a fool. So if you have charging issues and have an alternator changed, putting a larger pulley on can make sense turn into saved dollars(especially on high revving engines).

I hope this info helps to solve some draining battery and/or alternator issues.

thanks.gif for reading,


Apr 12, 2012 | 2003 Ford Mustang

1 Answer

I have a 96 frod mustang and the alternator is not working, how can i fix it?

First to do is to take it to your nearest auto part store. Most will check the battery and charging system for free. That way you will be able to see if the battery won't take the charge or if the alternator is bad. If the battery is bad they will replace it for free when you purchase it from them. The alternator will be on your own to replace. And being a 96 model you might need metric tools to do this. Hope this helps.
Michael A.

Jan 22, 2011 | Ford Mustang Cars & Trucks

2 Answers

96 Ford explorer. 4x4 lights blink.

possibility you have a bad battery that will not hold a charge or an alternator that is not charging the battery to it's potential, might want to get it checked in a shop....or try changing the battery....if it keeps up, it could be the alternator.....hope this

May 21, 2009 | 1996 Ford Explorer

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Why won't my new alternator charge my new battery

the power wire for that lays on top the intake probly has bad spot drawing out the current

Apr 08, 2009 | 1995 Ford Mustang

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check to see if all of your cables are intact and nothing is grounding out anywhere

Apr 03, 2009 | 1996 Ford Mustang

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Fuses for 2002 mustang gt

There is no fuse for the alternator. If the alternator is working properly, it should charge the battery. Have you had the alternator tested? That is where I would start. Remember, just because it is new, doesn't mean it can't be broken.

Jul 12, 2008 | 2002 Ford Mustang

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