Question about 1991 Ford Thunderbird

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91 thunderbird not charging

Well i have replaced the terminals alternator alternator harness battery now im getting ready to change the engine ground to the batterry because it was corroded and split in many places and in one spot it has been rubbing into the frame

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You need a new igniton control, if it is bad your alternator wont charge your battery and you will be sad!!!
http://www.autozone.com/N,16400189//shopping/partTypeResultSet.htm

i have a 91 thunderbird and it took me days of testing to determine that the OEM ignition control is not built very well and will cause charging problems! go to auto zone buddy yeah!!

Posted on Oct 15, 2008

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Dear annieek,
I have the same problem on my 91 Bird. I have checked with a friend that owns a repair shop. He says when you turn the switch on you need to have the Alt. light to come on before you start the car, if it does not come on (mine does not) it is a wiring problem. That light must come on before the car is started in order to "excite" the Alternator. I am in the process now of taking the dash apart to find the problem of why the light is not coming on. More info later. This may give you a starting point.

Posted on Oct 08, 2008

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When not running the engine for a week, the battery dies. When I jump start it, engine will start cranking very slow and pickup speed before it starts running.


it seems like the battery is going. clean battery terminals, also the grounding to the body (engine block, transmission, etc.) all should be shiny cleaned. suggest you go to autozone (or other auto parts) for a free battery & alternator tests.

Oct 04, 2015 | 2001 Ford Mustang

1 Answer

My 94 5.4ltr. Thunderbird engine surges and my alternator gauge and headlights surge.But seems to charge the battery ok. Always starts.Only code i get says #7 misfire. Right bank coil pack.


Try replacing the wiring harness that connects to the top of the alternator. They vibrate and the wires inside break. They are only about twelve dollars.

Mar 05, 2015 | 1994 Ford Thunderbird

1 Answer

Need to change the alternater


Removal & Installation
  1. Disconnect the negative battery cable.
  2. On the 3.2L (VIN V) engine, raise and support the vehicle. Remove the right front wheel.
  3. Remove the alternator belt.
  4. Disconnect and label the alternator wiring harnesses.
  5. Remove the mounting bolt from the alternator bracket.
  6. Remove the alternator from the engine.

To install:

  1. Position the alternator on the bracket and install the pivot bolt.
  2. Install the belt and adjust the tension.
  3. Reconnect the alternator wiring harnesses.
  4. On the 3.2L (VIN V) engine, install the right front wheel. Lower the vehicle.
  5. Connect the negative battery cable.


























































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Precautions (make sure you have any alarm codes and equipment working correctly before disconnecting the battery)

Several precautions must be observed with alternator equipped vehicles to avoid damage to the unit.

  • If the battery is removed for any reason, make sure it is reconnected with the correct polarity. Reversing the battery connections may result in damage to the 1-way rectifiers.
  • When utilizing a booster battery as a starting aid, always connect the positive to positive terminals and the negative terminal from the booster battery to a good engine ground on the vehicle being started.
  • Never use a fast charger as a booster to start vehicles.
  • Disconnect the battery cables when charging the battery with a fast charger.
  • Never attempt to polarize the alternator.
  • Do not use test lights of more than 12 volts when checking diode continuity.
  • Do not short across or ground any of the alternator terminals.
  • The polarity of the battery, alternator and regulator must be matched and considered before making any electrical connections within the system.
  • Never separate the alternator on an open circuit. Make sure all connections within the circuit are clean and tight.
  • Disconnect the battery ground terminal when performing any service on electrical components.
  • Disconnect the battery if arc welding is to be done on the vehicle

Jul 25, 2012 | 1996 Honda Passport

1 Answer

2002 Ford thunderbird will not hold charge in battery jump starts ok but after shuting it down it will not start back up. does not seam to be recharging the battery. were can i find a how to to change...


It may be a bad alternator. After jump starting the engine and while idling, remove the negative terminal of the battery. Observe if the engine dies, then the alternator is bad.

May 16, 2011 | 2002 Ford Thunderbird

1 Answer

Replaced alternator, voltage regulator, and battery is near new, but the battery won't charge. Is there a wire somewhere that is known to go bad frequently I could check. I know on GM products there is...


There is a Ford Technical Service Bulletin and Ford Repair Harness Connector Kit that may be your problem.


Good luck!


Article No.
96-21-4
10/07/96
^ CHARGING - GENERATOR DISCHARGE - LOOSE OR WEAK CONTACT AT GENERATOR HARNESS CONNECTOR ^ WIRING - GENERATOR HARNESS CONNECTOR DAMAGE - LOOSE OR WEAK CONTACT FORD:
1985-90 ESCORT, TEMPO
1986 TAURUS
1986-90 CROWN VICTORIA
1987-92 THUNDERBIRD
1987-93 MUSTANG LINCOLN-MERCURY:
1985-87 LYNX
1985-90 TOPAZ
1986 SABLE
1986-90 GRAND MARQUIS, TOWN CAR
1987-92 COUGAR LIGHT TRUCK:
1985-90 BRONCO II
1985-91 AEROSTAR
1986-91 ECONOLINE
1986-92 RANGER
1986-93 BRONCO
1986-94 F-150-350 SERIES
This TSB is being republished in its entirety to update the Service Procedure outlined in the Action.
ISSUE:
When a generator fails, there are a few failure modes that may cause heat to be produced at the wiring harness-to-generator connector. This excess heat may damage the female terminals on the wiring harness, resulting in increased resistance. The increased resistance produces more heat. When the generator is replaced, the resistance produced by a damaged connector may damage the new generator and could result in a repeat repair, including installation of another generator. High resistance (caused by a damaged connector) will not go away until the damaged connector is replaced. ACTION:
Visually inspect the harness-to-generator connector for damage (heat, corrosion, distortion and cracking) before installing a new generator. Install the Generator Wiring Harness Connector Kit (E5AZ-14305-AA) if the harness-to-generator connector is damaged. The Generator Wiring Harness Connector Kit (E5AZ-14305-AA) contains the following:
^ One (1) Red Wire **** Connector ^ Two (2) Yellow Wire **** Connectors ^ One (1) Wire Connector Assembly ^ One (1) Instruction Sheet (I.S. 6849) PART NUMBER PART NAME

E5AZ-14305-AA Generator wiring Harness Connector Kit

Jan 13, 2011 | 1985 Ford Tempo

1 Answer

Hi all, just about lost my hairr with this one. I have a 2001 7.3L, dual battery single alt set-up. I have replaced both batteries once, had them load tested a few times now, replaced the alternator...


Try to measure if there is a loss in the grounding harness between engine and body, and Batteries and body. By connecting a DVM from a good grounding point in body to either engine and battery neg terminal.
Try to "nail" the test probe to the lead terminal of the bat, in case there is a "contact resistance" between connector and terminal.

Dec 09, 2010 | 2003 Ford F250 Super Duty Crew Cab

1 Answer

The alternator on my girlfriends 91 Chrysler Lebaron isnt producing enough power to recharge or keep my battery charged. its giving me the codes DTC41, DTC 35, AND DTC 31, now i know that one of those...


There are 2 types of alternators for this vehicle .code 41 is a field circuit code for the alternator The SBEC controlls the charging rate of the alternator . It could be wiring connections or the SBEC ( computer) to be the problem .You may have to back probe some terminals to find the problem ,but first check all of the engine grounds including the negative battery cables. The fault code for the field circuit is most likely generated because of an open circuit . The SBEC (computer) supplies the ground to energize the field circuit ..

Hope this helps

Aug 07, 2010 | 1991 Chrysler LeBaron

1 Answer

Battery light is staying on. replaced the battery, alternator, and has a new starter, and serpentine belt


with engine control switch ON and engine running at amoderate speed, charge indicator lamp should be off, if lamp is not off, detach wiring harness at generator. iflamp goes off generator is faulty. if lamps stay on, check for grounded "L" terminal in wire harnes

Jun 19, 2010 | 1991 Chevrolet Corsica

1 Answer

1979 Ford Thunderbird alternator not charging


Are the connections really dirty at the voltage regulator? These tend to get corrosion on them and cause weird charging system issues. Also make sure the ground is good on the regulator.

Jul 04, 2009 | 1988 Ford F 150

1 Answer

78 T Bird Not Charging. Have replaced alternator. Battery was charged off car.


did you inspect the + and - batt cables for damage? trace both cables esp the - to where it bolts to a ground. is your batt sealed, or are there caps that you can pry off to inspect the fluid level of each cell? use a batt electrolyte tester works sim to a cooant tester and check the strength of each cell. at first inspection of the batt cells, they should all be submerged in fluid. check the voltage of your batt with engine off and again with engine at idle.(if engine will start) around 12v (obviously) with engine off. start eng and recheck voltage-if it is higher say 13.0v or there abouts the alt. is working as it should. check your wiring harness for damage/corrosion/loose connections at the terminals. use a multimeter to check for voltage drops at various points. by what you have described it is probably a bad battery. checking for damage to batt housing/loose connections at the + - batt posts/corroded wires- pull batt cables off batt clean the posts w/a brush and baking soda solution, insert/turn a batt post cleaner over each post, apply a light coat of dielectric grease onto each post, connect the clamps to respective posts dont over-tighten so much that the terminal clamps get marred, but get them tight. good luck

Apr 04, 2009 | 1983 Ford Thunderbird

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