Question about 1982 Ford F 150

1 Answer

Alternator not charging

Hi
on my 1982 ford f 150 picup the alternator light is lit with the truck running I get 12 volts at the batter and at the alternator if i disconnect the battery the truck stops. on the field wier i get 2.5 volts on the [s ] wier i get 1 volt

I put in a new alternator a new voltage regulator and a new battery and new ends on the wiers the light is still lit HELP

thanks joe

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 106 Answers

Hi

If you have a volt meter, set it to volts and hold the negative probe to the alternator body and the positive to the battery positive. If you don't get battery voltage then the alternator isn't grounded and the probable cause is the main engine ground cable either breaking or coming loose.

Very best regards

Geordie

Posted on Jun 10, 2008

  • Steven Adams
    Steven Adams Jun 11, 2008

    Measure the voltage coming out of the alternator AT THE ALTERNATOR, not at the battery. If its higher than the voltage at the battery then you need to replace the battery leads, particularly the battery to alternator one.



    Regards



    Geordie

×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Battery fitted to 1982 XD 4.1 fairmont sedan


call any batter shop and they will be able to tell you in less than a minute or as fast as a computer brings up the details
it will take a 12 volt batter around 600 cca but the shop will get it exact

Feb 17, 2016 | Ford Cars & Trucks

1 Answer

I have a 1982 ford thunderbird.has new alternator but amp light stays on.charging voltage is 11 volts.


That means you must not be getting power to it to excite your field and make the alternator charge. Look for a blown fuse or fuseable link that is suppose to supply 12 volts to the alternator when the key is on.

May 15, 2015 | Ford Cars & Trucks

2 Answers

Battery light flashing jump it ,it will start but not run


It could be you have a fault in the Diode pack in the alternator you need to get this checked at an alternator repair center.

Dec 03, 2014 | 2000 Ford Mustang

1 Answer

What to check


Check the voltage at the batter with the engine running. You should see more than 14 volts. If it is less than 13 volts than the alternator is no longer charging. Make sure you check for power on the large wire on the back of the alternator!

Feb 18, 2012 | 2006 Ford Focus

2 Answers

Battery light comes on and off, changed battery cleaned all connections light still comes on and off


Battery light is a signal from the alternator that charge is below a given voltage , check charging system.

Oct 24, 2009 | 2000 Ford Focus

1 Answer

My 2005 ford explorer check charging system warning light


if charging light is on w/ engine running,the fault could be the alternator or another component of the charging system.remove, clean and tighten battery post connections to check for alternator output,use a volt meter or multi-tester set to 50 Volts DC,w/ tester on battery terminals it should read 12 volts W/ engine off;13 to 14 volts w/engine running.if voltage increases when alternator is spinning,suspect battery

Sep 28, 2009 | 2002 Ford Explorer

2 Answers

Why is my battery light lit at all times?


It usually means you need an alternator. You need to test for 12 volts at the alternator first before comdeming it. If 12v does not exist you will have to figure out what main fuse is popped

Jul 30, 2009 | 1998 Ford Escort

1 Answer

Electrical/Battery Light


Hi,I am Ron,Look at the alternator out put voltage,and have the battery load tested.Also check bad connection from battery to alternator(this is the large wire/cable).alternator turns the battery light on,why?You need to figure out witch one.A diode could be going out in the alternator,diodes change ac voltage to dc voltage ,that`s why the call it a alternator(alternating current)AC voltage means alternating current. If it goes unrepaired it can ruin battery,changing battery voltage from 12 volts dc to 12 volts ac.Also there is a built in voltage regulator that holds voltage down to about 14 volts charging while car is running.Voltage regulators can cut off charging completley or open wide allowing alternator to charge as much as 18 volts dc,ruining battery(boiling battery acid out of battery)and ruining alternator by burning fields and rectifiers out.So have it checked or do it your self.Auto parts stores can check alternator and battery.If I can be of more help,please ask.roniecon@gmail.com

Jul 19, 2009 | Ford Five Hundred Cars & Trucks

1 Answer

Battery Charge


The best way is to get a voltmeter and check the voltage of the battery with the truck running and not running. When the truck is running, the voltage across the battery terminals should be aboput 14.9 volts (showing the alternator is charging the battery). With the truck off, the battery voltage should be about 12 volts (showing that the battery is holding the charge). From there, you should be able to tell which is bad.

Aug 11, 2008 | 2002 Ford Escape

Not finding what you are looking for?
Cars & Trucks Logo

188 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

70365 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22041 Answers

Ron Lankford

Level 3 Expert

5386 Answers

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

Answer questions

Manuals & User Guides

Loading...