Question about 1989 Ford Taurus

5 Answers

Put in a new battery. it didn't even last 24 hours battery light was on in car drove it and it shut off in the middle of the road when stopped at a stop light. had the alternator tested it tested good got new battery and voltage regulator got vehicle home went to start it the next day wouldn't start. Just put in a new alternator and battery went to store and came out and wouldn't start again. got someone to jump me made it home pull in the driveway barely made it in the driveway shut off and wont start again.

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  • 3 more comments 
  • soccermom399 May 12, 2010

    please give me more advice

  • soccermom399 May 12, 2010

    please give me more advice

  • soccermom399 May 12, 2010

    please give more advice trying to get as much information i can

  • soccermom399 May 12, 2010

    just trying everything you guys have to offer

  • soccermom399 May 12, 2010

    im taking whatever i can got hit something sooner or later

×

5 Answers

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  • Master
  • 630 Answers

I don't know..... but what you are saying sounds typical of a bad alternator not recharging, when you had it tested did they test it in the car or did they have you remove it and bench test it?
Let the shop run the vehicle and be certain the belt is not getting loose from heat causing it to stretch and causing the alternator to stop charging, as well I still have my doubts about the alternator, this vehicle has the regulator built into the alternator, also the alternator has a diode pack inside it and many other factors that can change from hot to cold (stator windings etc.) concerning output voltage.
Who and how did it get tested?
Needs to be checked with all accesories on needs to read 13.0-14.5 volts dc anything less is causing the discharge, I am a firm believer that if the regulator is defective and it is mounted inside the alternator....why would you not change both as a unit, another 100.00 saves you the stress of getting stuck someplace you don't want to be in the first place, the alternator is as old as the regulator... so wear factors and time come into play as well as rip and tear down time also replace the belt if it is original while this thing is apart, and be certain the wiring off the alternator is not frayed or broken or grounding anywhere.
Have the system tested by a reputable source with expert test equipment to eliminate any guess work that may be over looked with home owners test devices.
If you were to statically te4st the stator windings and commutator cold you may find them to be picture perfect on an ohms scale however let it heat up a bit and you may see quite another picture of an open winding causing discharge under stress.
You did a good job and if the problem was solved you would be in good shape sometimes you have to let the techs take over, seems that way in everything we do...from cars to electrical appliances.
Good job hope this all helps ease your mind and gives you direction at this critical time.

Posted on Aug 09, 2010

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  • Ford Master
  • 75,817 Answers

Is the battery light on in the dash when the engine is running? did u replace the large connector at the Alternator? what is the voltage output of the alternator? if should be 13.3 volts or more at idle.

Posted on May 12, 2010

  • 11 more comments 
  • yadayada
    yadayada May 12, 2010

    I need u to perform basic tests to help u, I'am a Ford dealer tech of 35 years experience and you need to supply the basic information i asked for. U can also call if u like i am in the USA 925-459-0571

  • soccermom399 May 12, 2010

    yes the battery light is on when the car is running. replaced the alternator. right now i have a battery charger on the battery.

  • yadayada
    yadayada May 12, 2010

    Look in order to help u we need basic information and you must supply that we can't, we ask questions and you answer, that is how the car gets fixed

  • yadayada
    yadayada May 12, 2010

    If the battery light is on the laternator is not produciong any output to charge the battery, see if u have 12 volts at at one of the 2 wires in the connector at the alternator with the key turned to run, also do u have 12 volts at the large red wire on the post of the alternator?

  • yadayada
    yadayada May 12, 2010

    I very seldom give my phone # out so customers can call me at home, I provided my number because this is a Ford and I am a Ford dealer technicain, I suggest you take atvantage of the offer, I have to go out for an hour or so, so u can reach on my cell phone at 925-577-7157, my name is Dennis

  • yadayada
    yadayada May 12, 2010

    I still have no answwers on the questions i asked?

  • yadayada
    yadayada May 12, 2010

    well guess u really don't want to fix this.

  • yadayada
    yadayada May 13, 2010

    If the information i have provided is helpful please give me a "HELPFUL" rating, thanks

  • yadayada
    yadayada May 13, 2010

    DID U DO THE TESTING I OUTLINED FOR YOU? IF SO WHAT WERE THE RESULTS??

  • yadayada
    yadayada May 19, 2010

    IS THIS REPAIRED??

  • yadayada
    yadayada Jun 17, 2010

    pleaase accept one of the solutions to clear books, thanks

  • yadayada
    yadayada Jun 17, 2010

    U really know zero about cars right? are u just a lttle slow this way?

  • yadayada
    yadayada Jul 01, 2010

    is this car running or not?

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  • Ford Master
  • 17,970 Answers

I undertsna dthat you are make few change/replace parts there, even with this changes, several task to check here, try it:
* Sounds like your alternator is not recharging your battery. Your battery has become so low that it can only light the lights when there is no heavy load (starter). Your alternator may be defective or have bad wiring.
* Check the voltage on the battery, have someone try to start it and see if the voltage holds above 12v. If not, your battery is discharged. If the voltage stays up, check your battery terminals and cables. You need to get 12v to the vehicle as well.
* Check your battery terminals. If they are loose, you can have this problem. Check your battery cables. You need to be getting 12V to the rest of the car. Check the battery voltage when the key is on. What made me think the battery went down. With the headlights on, what is the voltage at your battery? At the fusebox?
* Next, measure the voltage between the starter hot wire and the block. Again it should have good voltage. Is this is around 13V, sounds like your battery is great! Now we continue to check the power supply.

Any RELAY can have bad connection and making ground; various relays are used in conjunction with the vehicle's electrical components. If a relay should fail it must be replaced with one of equal value.

Replacement is simply a matter of disengaging the electrical connector and sliding the relay from its mounting. Depending on a vehicle's equipment, it may contain several of the following relays.
- Alternator Output Control Relay -located between the right front inner fender and fender splash shield (if equipped with 3.0L or 3.8L engines and a heated windshield. - Anti-lock Motor Relay -located in lower left front of engine compartment (if equipped with anti-lock brakes).
- Anti-lock Power Relay -located in left rear corner of engine compartment (if equipped with anti-lock brakes).
- Autolight Dual Coil Relay -located behind the center of the instrument panel on the instrument panel brace (if equipped with automatic headlights).
- Fog Light Relay -located behind the center of the instrument panel on the instrument panel brace.
- Horn Relay -located behind the center of the instrument panel on the instrument panel brace.
- LCD Dimming Relay
-located behind the center of the instrument panel on the instrument panel brace (if equipped with automatic headlights). - Low Oil Level Relay -located behind the center of the instrument panel on the instrument panel brace. - Moonroof Relay -located behind the right side of the instrument panel (if equipped with a moonroof).
- Police Accessory Relay
-located behind the center of the instrument panel on police models.
- Starter Relay -located on the left fender apron, in front of the strut tower. - Window Safety Relay -located behind the right side of the instrument panel (if equipped with power windows).
Finally, for one "no start" condition, the problem may lie in the ignition switch itself. It may be staying in the on position from what you are discribing and draining the battery. Doing an electrical load test will tell you the condition of your alternator. The ignition switch is easy to remove and replace. Most parts houses carry them. The only thing here if replaced, you will have a different key unless you want to have a locksmith key it to the original. On the steering column underneath the key cylinder, there is a samll hole. Disconnect the battery, turn the key to the on position and put a small pick straight up through the hole. There is a pin that will disengage the cylinder allowing you to pull the cylinder out. Once out follow the directions on the replacement to re-install. The cylinder has to be in a proper position(start)so it engages.

Its possible that this wiring diagrams can helpfull...

put in a new battery. - a18349c.jpg

Fig.: Body wiring diagram-1989-90 vehicles

899ac54.jpg

Fig.: Starting and charging system wiring diagram-1989-90 vehicles

Tell us news.

Posted on May 12, 2010

  • ZJ Limited
    ZJ Limited May 12, 2010

    Voltage Regulator - ADJUSTMENT
    The electronic voltage
    regulator is calibrated and preset by the manufacturer. No adjustment is
    required or possible.

    REMOVAL & INSTALLATION

    Side
    Terminal Alternator

    This voltage regulator is mounted on the
    right-hand fender apron of the vehicle.




    1. Disconnect the negative battery cable.


    2. Detach the electrical connectors from the wiring harness.


    3. Remove the regulator mounting screws and the regulator.


    4. Installation is the reverse of the removal procedure.


    5. Connect the negative battery cable. Test the system for proper
      voltage regulation.



    Rear Mounted Regulator
    (see Figure 1)
    This
    voltage regulator is mounted on the rear of the alternator housing.




    1. Disconnect the negative battery cable.


    2. Remove the four retaining Torx® screws attaching the voltage
      regulator to the alternator rear housing.



    3. Remove the regulator, with the alternator brush and terminal
      holder still attached, from the alternator.








    Fig. 1: Voltage regulator mounting-vehicles equipped with the
    rear mount regulator alternator




    To install:




    1. Install the regulator to the rear of the alternator assembly and
      fasten using the four retaining screws. Tighten the screws to 20-30 inch
      lbs. (2.3-3.4 Nm).



    2. Connect the negative battery cable.

    Check it and tell us news.

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  • Master
  • 1,297 Answers

A lot depends on your year make and model of the vehicle but with all you've said you have a few possibilities still

1.) voltage drop from alternator to battery
2.) computer not commanding charge of battery
3.) engine/battery ground issues
4.) belt adjustment

Posted on May 12, 2010

  • Sean Reisdorf
    Sean Reisdorf May 12, 2010

    since this is a 1989 Taurus I am going to stick with my original answer...
    voltage drop in the battery and alternator cables

    to confirm, you need to measure voltage at the alternator and the battery with the engine running

    I suspect you will find 14+ at the alternator and only 12 at the battery


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  • Expert
  • 4,070 Answers

Hi! New battery, alternator and voltage regulator installed, theres no way it can be drained. Have you checked it with your auto electrician mechanic? This may require on hand checking for faulty or grounded wirings. This can only be the reason thats why it always fails. Please see an auto electrician to trace it out. Let me know how it goes. Good luck!

Posted on May 12, 2010

  • 3 more comments 
  • dj_relly999
    dj_relly999 May 12, 2010

    Try to have your a/c compressor checked. This may result to battery failure too if the magnetic of the compressor is faulty.

  • dj_relly999
    dj_relly999 May 12, 2010

    Hopefully we hit it right on the spot to fix the issue. Good luck!

  • dj_relly999
    dj_relly999 May 12, 2010

    Good luck!

  • dj_relly999
    dj_relly999 May 13, 2010

    Hows the fixing going?

  • soccermom399 May 13, 2010

    haven't been able to get anyone to look at it yet. Thanks for asking

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