Question about 1990 Ford Taurus

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Got a 1990 ford taurus and new battery and new alternator but still has 3 amps of draw .what controls the alternator? the wire to it ...

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Unfortunately if it was a rebuilt alternator it may have one bad diode causing it to bleed amps and drain the battery. With rebuilds this happens a lot these days. Either have the diodes tested or demand a different alternator under warranty.

Posted on Mar 23, 2011

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1997 ford taurus new altornator wont charge battery


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

Sep 14, 2016 | 1997 Ford Taurus

1 Answer

DOES THE FORD TAURUS HAVE A VOLTAGE REGULATOR


Every car ever made has a voltage regulator

The alternator is just that-- AC Current that is rectified
to DC-- to run the car & charge the battery

Just about every car for the last 40 years has the
regulator inside the alt

How it is controlled varies from manufacture,make,
model,year,etc

You can not charge a defective battery

You may have external issues that provide
regulator control,even a bad ignition sw on
some cars,or module control of regulator

Need a wiring diagram & a good amount of
knowledge to resolve your current problem

Jan 24, 2013 | 2001 Ford Taurus

1 Answer

New battery car would not start,change regulator changed alternator, returned battery for new one still the car will not start 1990 ford taurus v6


does it crank?? if not possible starter malfunction.
if it does crank but doesn`t start then it is ignition problem and you will have to tow vehicle to repair shop.

Feb 17, 2011 | 1990 Ford Taurus

3 Answers

My 1990 Ford Taurus has a battery drain problem. I'm not sure what is draining it but I just bought a new alt. and new battery and the next day the new battery was dead and I had to jump it. Could it be...


I fixed the same problem in my 1990 Ford Taurus, it turned out to be the external voltage regulator.
I determine that my external voltage regulator had failed by testing the charging voltage across the battery while the car was idling. It should be a maximum of 15V for most batteries; mine was at 17.8V which means the voltage regulator was not regulating the voltage sent to the battery. Also when the car was parked it pulled a constant 3.0 amps (which drained my battery overnight). I was able to test for the amperage draw by just disconnecting the voltage regulator and hooking up my multimeter in series with the battery, the draw was gone.
I replaced the voltage regulator, which is a very easy fix, and I was good to go again. :)
Hope this helps someone too.

Feb 02, 2011 | 1990 Ford Taurus

2 Answers

Put in new alternator 98 ford taurus dohc car will start thn stop


Check ground wire from engine to frame and battery to body

Jul 23, 2010 | 1998 Ford Taurus

1 Answer

I just installed a new alternator on my 1990 ford


is the battery charged, check the ground wire going to alt, or batt or even frame....

Mar 31, 2010 | 2003 Toyota Matrix

1 Answer

New battery and alternator and the battery wont stay charged, i allready checked the connections and cant figure out why its still not charging


If it is going down after it is parked ,then it has a draw on the electrical system,or if it is going down as it is driven,then the large output wire on the back of the alternator is not getting to the battery,if needed,run a wire ,along with the original wire from the back of the alternator,to the battery to get it to charge.Other wise ,the system has a draw,pulling voltage from the battery with the car not running.

Feb 01, 2010 | 1996 Ford Taurus

1 Answer

1990 Ford Taurus SW 3.0L Power Problem


CHECK GROUND WIRE FROM BATTERY TO BODY AND BODY TO ENGINE

Aug 02, 2009 | 1990 Ford Taurus

1 Answer

1990 ford taurus won't turn over 3.0l engine auto


first check all fuses, even the high amp fuses under hood. if you replaced the batt. cable and all that check the wiring in the steering column and the wiring to the fuses under the dash. mice get in there and really make a mess!! it could b the key switch too

Apr 09, 2009 | 1990 Ford Taurus

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