I have a 1997 ford Taurus and it will is draining the battery. I replaced the alternator and am still having the same issue any help would be appreciated.

check fuses and wiring connections --was the battery tested before alternator was replaced --test battery and alternator battery may be failing or has failed --alternator improper wiring -or new doesnt mean free from defects

That suggests that the problem is in the harness, something in the connector or wiring is causing an open circuit. You will need to have the circuit tested to find the fault. Ford alternators have known connector issues & new aftermarket connectors are readily available at most auto parts stores.

There are few possible reasons why battery is not holding charge.May be its weak battery or there is loose connection between battery to alternator.There are few troubleshooting help links,related directly to these types of problem,with there troubleshooting procedure.--------Click the link below and go through its troubleshooting details to resolve the issue:---Car battery loosing its charge overnight? http://schematicsdiagram.blogspot.com/2011/11/car-battery-loosing-its-charge.html
--------How to troubleshoot car battery?

http://schematicsdiagram.blogspot.com/2011/06/how-to-troubleshoot-car-battery.html

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After replacing Alternator, the battery indicator light Comes ON dash? http://howtobyme.blogspot.com/2011/11/after-replacing-alternatorthe-battery.html
----------1998 Ford F150 pickup Battery Drains overnight due to Alternator? Alternator drains car battery? http://technoanswers.blogspot.in/2012/02/1998-ford-f150-pickup-battery-drains.html---------- 2002 Ford Focus sits over night and battery goes dead? http://technoanswers.blogspot.in/2012/02/2002-ford-focus-sits-over-night-and.html----------- Charging system problem on Chrysler LHS car? http://technoanswers.blogspot.in/2012/02/charging-system-problem-on-chrysler-lhs.html
-----------Toyota Corolla: Battery Drains out? http://howtobyme.blogspot.in/2012/05/toyota-corolla-battery-drains-out.html--------- 1999 Ford Taurus: Battery not holding Charge? http://whoisbyme.blogspot.in/2012/06/1999-ford-taurus-battery-not-holding.html
-------------How to Inspect Car battery? http://repairhelpcenter.blogspot.com/2011/12/how-to-inspect-car-battery.html------------ How to Test Car Battery? http://repairhelpcenter.blogspot.com/2011/12/how-to-test-car-battery.html--------- Car Battery Servicing? http://repairhelpcenter.blogspot.com/2011/12/car-battery-servicing.html--------- How to Replace Car Battery? http://repairhelpcenter.blogspot.com/2011/12/how-to-replace-car-battery.html-------- How to Inspect Car battery Terminals? http://repairhelpcenter.blogspot.com/2011/12/how-to-inspect-car-battery-terminals.html---------- How to clean car Battery terminals? http://repairhelpcenter.blogspot.com/2011/12/how-to-clean-car-battery-terminals.html---------- How to Replace Broken Car Battery Cables? http://repairhelpcenter.blogspot.com/2011/12/how-to-replace-broken-car-battery.html
--------------These details and procedure will help.keep updated for more help.Thanks.

Since you have replaced the alternator and I am assuming that the car still drives. This is a 175amp main fuse that should be OK. There is a 30amp fuse located in the engine compartment fuse box. These fuses are usually green. I believe it is going to be fuse number 25.. but just guessing on your car model. Glance and this and hope it helps..

Hello and welcome to FixYa!

Try replacing the battery connectors. Check the alternator wiring and battery cables if they are corroded. Something prohibits it from charging and one of it is corrosion.

Hope this helps and thank you for using FixYa! Have a good one!

Hi,

The problem should be from your alternator. The alternator charges the battery when the car engine is turned on. So, if your battery is being drained always, then it means your alternator is not charging the battery.

Have your alternator tested, in order to be sure its in good condition.

Best regards.

check your battery terminals first

If you unplug the harness from the alternator you may find that the drain will go away.If the rectifier is blown in the alternator the the regulater will not turn off making a 4 amp drain.Replace the rectifier or put on a new alternator.

check your grounds. check your connections.

You have an Alternator or alternator connector issue, have Auto Zone or Kragen test the charging system, it is free, most likely the alt will need to be replaced.