Question about 2003 Ford Taurus

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Alternator how do i get to my alternator on my 2003 ford taurus sel 3.0l? i need to get to the "charging lug"(the lug that has wire from alt to battery). please help!!!

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  • Ford Master
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For a 2 valve engine, I believe you ned to move the degas (coolant bottle) out of the way. Rate as fixya if this is what you need

Remove the bolt, the nut and position the degas bottle aside.

alternator - b5f6084.gif
Remove the generator electrical connectors.

  1. Remove B+ nut.
  1. Remove the stator and voltage regulator connectors.

Posted on Mar 15, 2009

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Why do i lose voltage intermittently from the alternator when i step on the brake ?


what engine size?
the PCM runs the show, and its bad. or wires bad to it.
your car has PCM regulator.
no charge battery light.?

1: takes a good battery and battery cables and lugs cleaned.
2: test the altenator, odd how 4 of yours all tested good but you replaced it 4 times, get it tested if good, its good.
3: then check that the charge .battery lamp works. if the lamp works
that means the PCM thinks that charge system is bad.
if the wires from the rear of the alt, to the battery red and Gy wires
are good all the way to PCM then the PCM is bad.
the big wire on rear of ALT , on one car had a bad lug. #6 wire.
he replaced the ALT 6 times. all wasted effort.
inspect the wiring first. that is free, and is simple fix.
and if the ALT casing is not grounded, all bets off.
same with battery minus lug not good, on BOTH ENDS>
one guy had his battery lug moved to frame, (wrong)
and this never worked.

Jul 07, 2014 | 1999 Buick LeSabre

1 Answer

Battery light alternator


The Charge lamp comes on with the Alternator fails to keep battery charge going. (lots of way to fail, and ALT Is 100% good) it's a system. each part of it must be good, end to end.
so...
i put my voltmeter across battery, i start car, i see 13.3 to 15vdc, alt is good.
no? , i see now, 12.2v. ALt is dead, (i didnt say bad) and battery is sightly discharged, 12.6v is charged. (key off, rested voltage)
This 12v tells me the ALT is shut down. only why is the question.

how can any charge system fail,
bad battery tops the list here, they LOVE to fail.
1: belt slips.
2: belt missing
3: bad alt.
4: bad wires to ALT . (corrosion on any wire or lug)
5: fuses blown , any listed below.:
your alt is not an ECU controlled, alt ,its 100% self contained

did you ever remove the ALT and blow the 100 amp fuseable link
the first step of any alt pul, is the pull the NEG, battery lug or BOOM.

im logged in to alldata.com so can you.

and what do i see.
a 5 wire ALT. one is the frame ground, so it must not be rusty or..... it fails. frame to engine block. no rust here.

wire L , yellow.goes to dash LEDs (alt failure idiot lamps) (this works)
wire. S white goes to ALT 5a fuse, is it blown?
wire :B B/G color, goes to the 100 amp link fuse. (blown>?)
wire IG Red-white, goes to a fuse marked 10A gauge.

i think the IG wire is the voltage sense wire.
no sense, no charge. I think the whole I/P dash cluster goes dead when this fuse blows.

The S wire is the boot strap voltage sense, it wakes up the regulator .
if open , the reg stays asleep, as does ALT.
Alternators can not self start, the regulator has boot strap device
that cures that. called self excitation. so this wire is critical.
All wires except the L wire is critical. in this case.

the B wire is the big wire, it charges the battery . 50amps or more..

any of the 5 paths open , kills the ALT dead.
The REG inside the ALT can also shut it down.
eg: battery bad, with huge cell resistances. total.
eg: overvoltge for any reasons. including attempts top run car with no battery, (dont ask)
eg: over current (battery cells 1 to 6 shorted) or 25 KC lamps added.
eg: over temperature shut down.

that is about it.







Dec 31, 2013 | 2003 Toyota Matrix

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

03 Taurus, battery light comes on. R&R bad alt &


You may have a a/c voltage leak comming from the alternator..If its a rebuilt alternator sometimes you get a bad one ..But make sure all your connections are good ecspecially the small wires coming out the back ..These are the field and sensor wires..Plus make sure all your grounds on the vehicle are not broken or missing..You can have good voltage but it may have a drop going to the computer because of a ground and cause the light to come on

Sep 15, 2011 | 2003 Ford Taurus

1 Answer

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

2001 taurus not charging. 3.0 24 valve. Battery light does not come on at all. Tried 2 alternators. Checked fuses and current at alt. post. Checked fuse at fuse box.


Waa there current at the alt. post? Does the alternator charge on a bench? If so, then the problem is elsewhere under the hood.

Maybe check continuity of the wire between alternator and the battery.

Jan 08, 2011 | Ford Taurus Cars & Trucks

1 Answer

The battery on our 2001 ford taurus sel keeps being drained.


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.

Oct 29, 2010 | 2001 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

Charging problem


If the alternator is wired incorrectly it will kill the alternaor. you need to verify you have the alternator wired correctly. Also, make sure none of the wires have been fraid and are rubbing against metal objects.

Jun 08, 2009 | 1994 Ford Taurus

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