Question about 1991 Ford Thunderbird

2 Answers

Wiring short charging system not working

Posted by jumpfrogs69 on

Ad

2 Answers

Joe Public

  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 3 Answers

There is a fusible link in the connection between the alternator and the positive battery cable connector.

On the 1997 it is a 175 amp Mega Fuse mounted on the outside of the high voltage fuse box located on the drivers's side in the engine compartment. After replacing the battery and the alternator, it turned out to be a $4.99 fuse that was keeping the alternator current from reaching the battery.

The alternator cable bolts on to one end of the fuse, and the positive battery cable bolts on to the other end. You can test it inline without removing it by checking for continuity across the two bolts. An open circuit indicates that the fuse is blown and needs to be replaced.

If the fuse is blown (which means you have an open circuit), the battery light in the dash should be on.

The car will start normally if the battery has enough of a charge, but it will eventually die when the battery is too depleted to keep the car running, because the alternator can't take over if the current doesn't make it across the blown fuse.

If the battery is dead, it will start with a jump start, but it will die shortly after you remove the jumper cables for the same reason.

This is one of those problems that you might not think of right away, and it will drive you out of your mind. ALWAYS check this fuse before replacing a battery or an alternator on a mid to late '90s model Thunderbird. You will save time, money, and you won't pull out your hair.

Posted on Nov 25, 2012

Ad

jeff rollins

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 239 Answers

See if all wires are connected tightly...battery,starter alternator. also see if any wires look melted or burned. if all that is fine then maybe a voltage regulator (if it has one)

Posted on Sep 15, 2012

Ad

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Got a 2002 blazer 2wd 4.3 v6. My headlights, dome light, and dash lights lightly flicker, and headlights dim when hitting the brakes. Anyone know where the short is, and/or how to fix it?


Well , find the short . videos on youtube showing how to . How to find short to ground blown fuse Finding active short

check out videos on basic electrical testing as well , have charging system tested as well , bad diode can cause flickering lights .

Jan 07, 2017 | 2002 Chevrolet Blazer

1 Answer

Charging problem


check fuseable link wires near the battery for corrosion or breaks in the wires these are designed to burn in half before loosing the entire wirin g harness in electrical fire or bad short..was anything tested..

Dec 15, 2013 | 1983 Mercury Grand Marquis

1 Answer

Last night I got pulled over and so I shut off my car. When I went to turn it back on NOTHING at all worked, the hazard lights and the key wouldn't even work. we jumped it and put a battery charger on...


Hello, First, you will need to charge the Battery and have it load tested. The charging system on your vehicle may be bad. Depending on the Year and Model, there is sometimes an inline fuse from the Alternator to the main wiring.

On some Models, the Alternator wires drape over metal lines and brackets and wear through and short the system. Just gently lift up on those wires leading from the Alternator and watch for bare wire. If you come across a fuse, check it.

Ford systems are very sensitive to low battery Voltage. While the system uses a 12 Volt battery, the top charge is somewhere between 13.2Volts- 13.6Volts. As you can see, that is over a 10% higher charge to have all systems working perfectly.

When a Ford detects lower Voltage, the Antitheft system and the Powersaver systems can cause both starting and charging problems. The vehicles may indicate a charge for 5 minutes or more after removing an outside jump, then cut off the circuit (2004 till?).

Autozone, Advance, and Oreillys give FREE scans and charging system tests. You can carry in the battery for tests. Once a topped off battery is installed, you should have the Alternator tested. Even if a new battery solves your starting problems, get the charging system checked.

Jul 15, 2011 | Mercury Milan Cars & Trucks

1 Answer

Charging system not working. Major problem with the 1991 Dodge Dakota 5.2L 4x4 Sport charging system not working, major drain on the battery. Searched for short. Any ideas? Already replaced alt. and...


Check output from alternator with a voltmeter it should be between 13.8 to 14.7 if so then check at battery if it is not at least 13.8 minimum to be charging then the big wire on back of alternator is not getting back to the battery through ammeter gauge in dash.
I have hooked a wire from back of alternator straight to the plus[+] side of battery to fix that issue.
Sometimes ammeter gauge burns out breaking the circuit from the alternator back to the battery.

May 16, 2011 | 1991 Dodge Dakota

2 Answers

I have a 2004 545i BMW. I have a new battery and don't leave the key in the ignition. What is causing my battery to die.


Most likely a short or the Alternator is not properly charging the battery and electrical system. First check the wires that go to the starter and lead from the battery to the Alternator for any breaks or possible shorts that are allowing the Positive wires to ground. If those are good, disconnect the battery positive wire and connect the jumper cable directly to the positive cable and jump the vehicle. Once it is running disconnect the jumper cable and test the voltage on the positive wire to see what the alternator is sending as a charge to the battery. Anything less than 12 v is an obvious problem and I believe it should charge at 14v but you would have to check the book on that. Your other option would be to remove the alternator and have it tested at one of the Auto parts stores that offer to do that, Auto Zone and Advance Auto come to mind. If there are no shorts and the Alternator is good then that leaves the Alarm system and interior lights as being the problem and you will have to isolate those areas for shorts or constant connections. You may have accidentally set your interior lights to constant on which would bypass the timer system if you have one. Check the dash brightness control knob to make sure it isn't turned all the way to one side or the other. This position typically sets the interior lights to constant on.

Jan 17, 2011 | 2006 BMW 750Li

1 Answer

Alternator is working well but charging only below 13V.


a bad battery(shorted cell), a heavy drain in the system(blower motor),a wire partially shorted,a defective voltage regulator on the alternator itself

Oct 16, 2009 | 1989 Mercedes-Benz 300-Class

3 Answers

My 2004 dodge diesel, the charging system is kicking on and off. i put a new alternator on 2 days ago and new battery cables.


My nephew had a similar problem and I was able to isolate a wire that was shorting out at the plug on the alternator. I'm not saying that it is the same problem, but I can tell you that he had charging problems and had the alternator replaced, but still got the intermittent charging problem. I took the car to an autoparts store and had them check the alternator output. While checking the output, I moved around some of the wires at the alternator to see if it made a difference in the output. I was able to narrow down one wire going into the plug that was shorting out. I pulled the wire from the plug and resoldered it and that fixed the problem. Just something to consider. Nothing is worse than intermittent electrical problems, so I sympathize. Hope this helped and best wishes.

Aug 10, 2009 | 2004 Dodge Ram 2500

1 Answer

Charging system error


Have the fusable link checked. It's a short insulated wire integral with the main wire harness. ( if it is equipped with one).

Jun 27, 2009 | 1983 Lincoln Continental

1 Answer

Short


Tour problem is in the voltage regulator inside the alt.
Replace the alt.

Oct 24, 2008 | 1993 Jeep Grand Cherokee

Not finding what you are looking for?
1991 Ford Thunderbird Logo

272 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

Marvin
Marvin

Level 3 Expert

85239 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

gerry bissi

Level 3 Expert

4388 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...