Question about 1984 Ford F 150

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

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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'

Posted on Jul 30, 2010

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I have a 2002 GMC Envoy, Quite frequently my charging light will come on and state that I only have 10 volts coming out and then all the sudden jump to 14 and work perfectly fine


How many mile are on you vehicle ? Have you ever had Alternator replaced before ? You alternator maybe starting to fail , brushes or the voltage regulator .
Charging System Indicators
BATTERY The IPC illuminates the battery indicator when the following occurs:
?€¢
The PCM detects that the generator output is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the PCM requesting illumination.


?€¢
The IPC determines that the system voltage is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the body control module (BCM) indicating the system voltage.


?€¢
The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 3 seconds.


?€¢
The ignition is on, with the engine off.
BATTERY NOT CHARGING The IPC illuminates the battery not charging indicator in the driver information center when the following occurs:
?€¢
The PCM detects that the generator output is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the PCM requesting illumination.


?€¢
The IPC determines that the system voltage is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the body control module (BCM) indicating the system voltage


It would be a good idea to have it checked out , most auto parts stores will do this for free !

Dec 29, 2015 | GMC Cars & Trucks

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

Alternator is charging at 16 volts making my battery over heat


Some of these models have alternators that are equipped with separately mounted voltage regulators which are known for this symptom. They are very inexpensive, and may possibly repair your vehicle.

Sep 07, 2011 | 1985 Ford F150

2 Answers

Battery not being charged by alternator. Is it the alternator, or the voltage regulator? How do I determine which?


The regulator is inside the alternator, Pull the alt. and get it bench tested.

Mar 03, 2011 | 1990 Ford F150

1 Answer

My 1984 ford f150 is not charging the wire from the alternator to the solenoid is getting hot and smoking i have put new alternator, battery, solenoid and voltage regulator


If your still having this problem after replacing all of that you either have a short on that wire or on the starter after the solenoid. I would check the starter.

Mar 02, 2011 | 1984 Ford F 150

1 Answer

Charge light was on and alternator was overcharging. had alt. rebuilt and new voltage reguator, not charging now. only getting 2 to 3 volts are the charge fuse beside battery. new voltage reg is electronic...


There is a fuse under the dash that is the same one that operates the fuel gauge, if it blows the alternator wont charge. If the fuses are good I would take the alternator off and get it tested. Hopefully the rebuilder will warranty it. I would also make sure the new regulator is compatible with the old type regulator system. Most large auto parts stores can test alternators, and they normally do it free.

Dec 18, 2010 | 1984 Toyota Pickup Deluxe

2 Answers

I have a 1990 f150 lariat my alternator wont keep my truck running I replaced the alternator today along with alternator harness. I got the alternator tested and its good, the battery is good, and soliniod...


https://s11.postimg.org/crrcun103/generator.jpg

Click on the link.
The diagram shows generator with internal voltage regulator and with external voltage regulator, at the moment, I don't know which one you have?
The bat terminal at the generator should be hot even with the key off, is it, use a test light. If no voltage either the fusible link is faulty or the wiring circuit to battery +. You can see fusible links in diagram.
Could be other issues, the generator probably needs excite voltage or it won't work. The excite voltage comes from charge indicator circuit. Does the charge lamp on the dash work?

Jun 29, 2017 | 1990 Ford F150

1 Answer

Need to find the voltage regulater on a 1993 f150 ford flairside


The voltage regulator is inside the alternator.The normal charge voltage is 13.8 to 14.2 volts dc. There is a fusible link that goes to the feedback wire on ford alternators to tell it to turn on.If the link blows open,the alternator will not charge,and replacing the alternator will not solve the problem.The schematic shows clearly that part of the circuit.

May 18, 2010 | Cars & Trucks

1 Answer

Running voltage is 16 volts. is this to high, poss alternator?


Your voltage regulator should start backing off the charge rate when it gets to 14.5 or so volts,so i would advise you to either replace the regulator [which is in the alternator] or the alternator it's self.A charge rate that maintains 16 volts will boil your battery dry and ruin it and also the acid that boils out of it will remove paint,rot hoses,ruin wiring etc. so do it soon.Hope this helps!

Jan 08, 2010 | 2002 Mercedes-Benz C-Class

1 Answer

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


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

Jan 05, 2009 | Ford F-250 Cars & Trucks

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