Question about 1992 Ford Mustang

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Battery will not hold charge on my fox body mustang. battery is good, alternator is good, starter is good. had it checked at firestone. they tell me I have an open diode some place.

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6ya6ya
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Posted on Jan 02, 2017

  • 28 Answers

SOURCE: Battey wont charge

may have a short somewhere but check the ground cable/ connections first, there will also be a ground from the engine block to the firewall if you cant find it attach a new one (don't use thin wire or it can melt) dosen't matter where you put it just as long as it gets a good connection at the block and firewall(no painted surfaces/use sandpaper)

Posted on Jan 05, 2009

Techjoel
  • 79 Answers

SOURCE: Battery in a 2001 Ford Escape won't hold charge.

After eight years, if the battery hasn't been replaced already, then it may be just that. Otherwise the only thing left to check is the battery cables themselves. Corrosion at the battery terminals is obvious but the alternator lead connection to the battery terminal might need to be verified electricaly. Also check the negative battery cable at the block and chassis. Basic charging system test is: Voltage at the positive terminal with ignition and all accessories off should be at least 12.6 volts. If below 12.6 even after 2 hour charge, replace the battery. With engine running at 1500 rpm, between 14.1.and 14.7 volts. With the accessories turned on one at a time, the charging voltage should drop and then come back up and not drop below 14.1 volts. If it does, the regulator is deffective. The voltage should change in response to loads and engine speed. Good luck, Techjoel

Posted on Jun 06, 2009

buffalonyman
  • 1865 Answers

SOURCE: car not charging

The battery is bad, replace it

Posted on Aug 19, 2009

  • 14036 Answers

SOURCE: Why is it that my 1966 ford mustang is not holding

THE 1966 FORD MUSTANG YOU HAVE EXTERNAL FIELD RELAY ITS AIR GAP IS .015 POINT GAP .020. VOLTS TO CLOSE 2.5 VOLTS THE VOLTAGE REGULATOR AIR GAP .049 - .056 POINT GAP .017 - .022 VOLTS AT 125 DEGREES TEMPERATURE IS 13.8 - 14.4 VOLTS.

Posted on Jul 14, 2010

lil_bro501
  • 25 Answers

SOURCE: I dont like how my

I don't know cost but you're looking at a HUGE amount of labour.

We did this converting an auto-equipped Mustang for road racing. You'll need a donor car as you need to swap the pedal assemblies, steering column, console, transmission, bell housing, and transmission cross-member. The auto trans coolant lines in the bottom of the radiator can be cut & crimped shut. You will need to cut a hole in the transmission tunnel for the stickshift to fit through - handy having the donor car available so you can cut the right size & shape hole in the right place. Because we used a HD transmission for racing, we had to hammer the transmission tunnel in a couple of areas to provide adequate clearance. I don't think you'll need to swap the instrument cluster unless yours shows the auto trans gear position.

Definately not a weekend project.lil_bro501.jpg

Posted on Mar 01, 2011

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Check or have the battery's state of charge tested with a voltmeter. If the battery is low on charge, have it charged up. If all connections on battery and starter are clean and tight,, car should start. If you get it started and the alternator/battery light stays on with car running, there is a charging system malfunction. Have the alternator tested, in that case.

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You may have a bad alternator, when the alternator isnt charging this will also turn battery light on, have the cars charging system tested, this will tell you if the alternator is charging, hope this helps.

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if thats good then check if the battery is 5 years old...if so then you might need to change it...it might be that the battery doesn't hold the charge...
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Generally, you can check and test alternator with this procedure...

1. Clean the positive and negative battery terminals to ensure a good connection with the tester's clamps.
2. Connect the positive and negative clamps to the appropriate battery terminals. The clamps must make firm contact with the battery terminals or the test results will be inaccurate or the tester may not work at all.
3. Turn the tester on and choose the option for "full charging system test." This will test your battery, starter and alternator and provide the most accurate picture of the problem.
4. Follow the directions on the tester's screen. These instructions will include cranking the vehicle after the battery test is performed, holding the engine at a certain RPM range and turning on certain accessories.
5. Read the results displayed on the tester's screen. The tester should scroll through the results, starting with the battery, then the starter and finally the alternator. An alternator test result showing diode ripple problems indicates a bad alternator.

Hope helps (remember rated this).
  • Step 2 Connect the positive and negative clamps to the appropriate battery terminals. The clamps must make firm contact with the battery terminals or the test results will be inaccurate or the tester may not work at all.
  • Step 3 Turn the tester on and choose the option for "full charging system test." This will test your battery, starter and alternator and provide the most accurate picture of the problem.
  • Step 4 Follow the directions on the tester's screen. These instructions will include cranking the vehicle after the battery test is performed, holding the engine at a certain RPM range and turning on certain accessories.
  • Step 5 Read the results displayed on the tester's screen. The tester should scroll through the results, starting with the battery, then the starter and finally the alternator. An alternator test result showing diode ripple problems indicates a bad alternator.

  • Read more: How to Test a Car's Alternator | eHow.com http://www.ehow.com/how_2079784_test-cars-alternator.html#ixzz0spTYveGJ

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    I have a 2005 Dodge Neon, gave someone a hot shot and now battery


    I doubt the boost would have effected the starter at all,but the battery may have seen it` last days,but,also,I would be more concerned about checking the alternator,and make sure it is charging correctly with the new battery.Checked at the battery,with headlights on,and ac on high blower setting,it should read 13.65 volts,to 14.255 volts,anything less is not good.

    May 02, 2010 | 2005 Dodge Neon

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    Im trying to hook up a 100 amp alt to a 68 mustang and the new alt only takes one wire. the problem is its not charging what am i doing wrong?


    The one wire goes to the battery positive or positive on the solenoid. If this is right check your grounds, make sure the battery grounds to the body in the engine grounds to the body and the alternators grounded to the engine. If this is good take the battery and the alternator to an auto parts store to have it tested. These types of alternators have the voltage regulators inside them. Also make sure the belt is tight for the alternator. Good luck.

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    Will not charge alt test says alternator is good


    Have the Battery tested, on all ford alternators the voltage regulator and rectifier are built in.
    There are only 2 components in this system so its going to be the battery or the cables.
    Check the negative cable as I have seen problems with the fox bodied fords.
    On rare occasions there will be a problem with the field wire going to the alternator, but I have only seen 1 in 20 years

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    Car wont start


    First clean all battery terminals ensure there is no corrotion, after cleaning them light coat with a dab of grease to protect from further corrosion.

    Although the lights may work, the battery may not have enough power to kick the starter over.

    Since you specified no noise, suggest you check the starter solenoid first. Ensure the battery is good and holding the charge.
    5 years old, time for a new one. 3 years old, need to have it check for CCA (Cold Cranking Amps)

    Ensure your alternator is working properly. May not be charging the battery.

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    1992 4cyl Mustang LX won't hold voltage.


    When you start the car does your stater ound like it is dragging ( slow turning )?,I would remove the starter and bench test it to see if it is dragging or operating properly. if you are not sure on doing this yourself look in the phone book for a shop that specializesin starters and altenators as they will usually test them for free, hoping to get your buisness and they can test it rite in the car without removeing it. I am thinking that your starter solonoid is shorting out and drawing your power. I am also wondering if your altenator belt is tight enough. also you mentioned that you checked and replaced one of your battery cables. was this because it was corroded inside ( under the insulation )?
    good luck and I hope that this helps you, and remember to rate all the solutions that are posted to you.
    Thanx

    Oct 18, 2008 | 1992 Ford Mustang

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