Question about Ford F-250

1 Answer

1984 Ford F250 5.8L 2 barrell New Battery new alternator new voltage regulator Still only puts out 12.12 Volts

Posted by on

  • wraith0127 May 11, 2010

    Is the truck running (key on, engine running) or just on (key on, engine off)? I know it's a stupid question, but you never know (no offense).

  • Neil Thomascik
    Neil Thomascik Nov 09, 2013

    engine running

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 16 Answers

This is not rare. Possibly bad "new" alternator or bad "new" regulator. Have seen it happen many times. :-)

Posted on Jan 07, 2009

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

I have a 1984 ford e-150..new battery...alternator tested good 2 times...new v


if you trace the main wire from alt to battery and still no charge,then you need a new alternator,it will not charge under load

Apr 28, 2015 | Ford Cars & Trucks

1 Answer

Voltage regulator


In some brand of alternators the regulator and brushes are an integral part and it is a matter of removing 2 screws and lifting out the part. On others the regulator is entirely separate unit located some where else on the vehicle. The voltage of 15.3 is on the upper end of the charge rate but it would be acceptable . Nominal voltage for a regulator is 14.5 to 15.5 volts. Understand that a battery is actually 13.2 volts not 12 volts and you need 14 volts for the battery to charge effectively. The higher the voltage the higher the amperage to run everything so if your alternator regulator is set at 14.5 volts then the max amps of the alternator would not be reached and if you have a current draw to run everything that is more than the output of the alternator then the battery will eventually go flat. Find yourself a reputable auto electrician and discuss the problem with him not a local mechanic

Dec 16, 2013 | Dodge Grand Caravan Cars & Trucks

2 Answers

There is a ground some were that is causeing the battery not to charge put new selinoid ,new battery,alternater,new key lock cylender check wirers fuses relay switches and battery still wont charge


It sounds like you have done a whole lot of replacing and not much "diagnosing". Did you chech for battery voltage at the alternator? There should be battey voltage at the large Black/Orange wire that is on the B+ terminal of the alternator. This wire should have voltage all the time. If there is no battery voltage, you most likely have a burned fusible link at the starter relay area.
There should also be voltage at the "S" terminal with the ignition on. If there is no voltage, then check for voltage at the "S" terminal of the voltage regulator. If there is no voltage at the "S" terminal on the voltage regulator then check the "I" terminal on the regulator for voltage.

NOTE: The voltage on the "S" terminal should be 1/2 that of the voltage on the "I" terminal.

If there is voltage on the "I" terminal, make sure your voltage regulator is grounded properly to the fender and retest to see if it is charging the battery. If it is still not charging, disconnect the regulator connector and connect a jumper between the "A" and "F" terminals of the connector. Start the engine. The alternator should now be charging the battery at high voltage (usually over 15 volts) If it does, replace your voltage regulator. If it does not, then you need to check your wiring between the voltage regulator and the alternator.

Please also review this article:

What Else Could Be Wrong?

Jun 15, 2011 | 1987 Ford F 150

1 Answer

I seem to have a charging of the battery problem. I would get 14 volts to my battery from my alternator and then 6 volts, i changed m alternator and things were going great, no problems. Now it is acting...


Hi,
If you were originally having a wild fluctuation in measurement at the battery the voltage regulator would have been shot. I'm not sure of what the condition was of the original alternator. But I would definitely have changed the voltage regulator. A bad regulator can ruin a battery and all sorts of other things. If you are now getting wild variations in voltage
1st Purchase and install a new voltage regulator. (probably about $20.00 these days.
Then check your new battery by doing the following:
1 Disconnect it from the truck's electrical system.
2 Charge it up using another vehicle and jumpers.
3 After disconnecting the battery from the jumpers, let it sit for a few minutes.
4 Check the voltage. If it is below 12 volts, the battery is shot. Replace it under warranty.
5 When you get the new battery, Install it in the truck and start it up. Then measure the voltages coming into the battery from the alternator and the new voltage regulator.
If all is well, your done.
If not. Pull the alternator and replace that.
Hope this helps,
Good Luck,
Mark

Jan 05, 2011 | 1988 Dodge Ram 50

1 Answer

I have a 1984 ford f150 with a new voltage regulator and perfectly working alternator but it charges at over 16 volts


a low battery in you meter could cause a higher reading. I've seen this before. Other than that the regulator is not working perfectly if its over charging or if you have a battery that will not hold a charge'

Jul 30, 2010 | 1984 Ford F 150

1 Answer

I just put in a new battery and alternator and my


First step is to check the voltage of the charging system. Should be around 12 volts when engine not running , 14 volts when engine is running.
If these test out OK then your warning light is the problem. Could also be a poor connection or broken wire at the alternator. Alternator must be grounded to work , but if it wasn't , the light would probably not come on.

Apr 08, 2010 | 1984 Nissan Pickup

2 Answers

Will not charge. replaced alternator, and voltage regulator. fusible link is good. battery tests good


good the alternator you installed be bad? if it tests good then theres a fuse or a wire thats bad, check links at starter and battery and alternator if it has them there,start there, i would first have that alternator tested.good luck. also check wiring to regulator had problems with that!!!!

Nov 14, 2009 | Lincoln Mark VII Cars & Trucks

1 Answer

Charging sytem light came on but battery and alternator are brand new.


CHECK ALTERNATOR VOLTAGE OUT PUT AT BATTERY USING A DIGITAL VOLTMETER.WITH ENGINE RUNNING IT SHOULD BE 13.5 TO 14.5 VOLTS.IF NOT YOU HAVE A BLOWN ALTERNATOR FUSE.OR DAMAGE WIRES TO ALTERNATOR.IF VOLTAGE IS OVER 15 VOLTS NEW ALTERNATOR HAS FAULTY VOLTAGE REGULATOR.

Sep 29, 2009 | 2001 Ford Windstar

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

Alternator not charging


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

Jun 10, 2008 | 1982 Ford F 150

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

Related Topics:

203 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

71338 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22059 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...