Question about 1984 Ford F 250

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84 ford F350 6.9 diesel charging system not charging batterys new alt,New voltage regulator, new positive and negative wires,

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  • w_warfieldjr Jul 25, 2009

    Thanks for all your help.

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Look for a fusible link out. You need to check for output on the alternator that you installed. make sure the batteries are fully charged before that, otherwise its not going to read right. start from the source. also, you can disconnect the batteries from the sys and do a continuity check on the wires in the loom, so you can see if current has a path, or if you have an open circuit. hope this helps

Posted on Jul 25, 2009

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SOURCE: charging system

If you have changed the alternator and regulator, about all that could be left would either be a short circuit that is draining current away, or a bad ignition warning light bulb. That is because the power to energize the field of the alternator, comes through this dash bulb.

Posted on Jul 25, 2009

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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

Have a 1993 ford e350 jamboree that the alternator is overcharging, put new voltage reg. unit on alternator and it seem to fix the problem, but when i went to use it again the charging light came back on...


If you have an engine computer that controls the alternator, you will have to check the wiring from the alt. to the PCM. Also check any fusible links and grounds are often overlooked.
Do you have dual alternators?

SECTION 414-00: Charging System - General Information 2002 E-Series Workshop Manual
DESCRIPTION AND OPERATION Charging System The charging system is a negative ground system consisting of the following:
  • generator
  • integral/internal voltage regulator
  • charging system warning indicator
  • storage battery
  • necessary wiring and cables
The generator is belt-driven by the engine accessory drive system. Refer to wiring diagrams for schematics and locations of the components and wiring.
The battery is a 12 volt direct current source connected in a negative ground system. The battery case is sealed and includes two vent holes to release gases. The battery has three major functions:
  • engine cranking power source
  • voltage stabilizer for the electrical system
  • temporary power when electrical loads exceed the generator output current
The optional dual generator package (7.3L diesel engine only) consists of an upper/lower dual generator system. The upper generator is a 6G 50/110 generator with a 2.49:1 pulley ratio. The lower generator is a 6G 50/110 generator with a 2.32:1 pulley ratio. Thus the upper and lower generators are not interchangeable.
This system is also monitored and controlled by the powertrain control module (PCM). The PCM monitors both the upper and lower generator I circuits to determine both generators' output and set possible fault codes (diagnostic trouble codes [DTCs]). The PCM only controls the lower generator by turning it on or off by opening or closing the lower generator off only when the glow plugs are commanded on by the PCM to avoid possible damage (excessive voltage) to the glow plugs.
Both generators are independent of one another and only control themselves (through their own internal voltage regulator). If one generator fails, the other generator can maintain system performance under light load conditions. Under a heavy load, the PCM should detect a problem, set a DTC and illuminate the warning indicator.
The PCM controls the charging system warning indicator and will command the light on if the PCM detects a problem on the monitored circuits.

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2 Answers

Where is the voltage regulator located?


The voltage regulator is built into the Alternator.

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1 Answer

2003 FORD E150 NEW ALT AND NEW BATTERY STILL NOT CHARGING


Your wiring diagram shows a fusible link between the battery and alternator. Also shows an optional voltage regulator. Trace the wire from the alternator back to the battery. Look for that fuse and regulator. I will paste the diagram below.

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1 Answer

1973 ford f250 trailer special. new alt. wont


That would be my first guess,they are not very exspensive,if this still does not help,run a large wire on the back of the alternator with the old one still connected,to the positive battery post.This will increase the voltage to the battery also.Put it on the large batt,connector on the alternator,and run it to the battery post+

Feb 24, 2010 | Ford F-250 Cars & Trucks

1 Answer

How do i polarize alternator after new regulator saab9000 1989?


You dont. Alternators DO NOT require polarisation as they can only be fitted to vehicles that are wired as NEGATIVE EARTH. If you have replaced the Alt, reconnect the wiring, reconnect the battery - Positive lead first then the negative lead, then start the motor !! Using multimeter, check the charge rate at the battery. It should be around 13.8 volts. The charge rate SHOULD NOT go above 14.7 volts and if it does, turn the motor off immediately and recheck the connections, especially any battery voltage sensing wires. if nothing appears to be wrong, contact an auto electrician and have them check things out. I have known faulty regulators, even in new Alternators..

Dec 27, 2009 | 1989 Saab 9000

2 Answers

What will cause a 1999 dodge diesel not to charge?? I have put new alt. on it and checked everything i know to check


How old are your batteries ? Diesels take a lot of juice to turn them over, I had a similar problem once, turned out to be the positive cable leading between the batteries.I would get a diagnostic on it to confirm your problem, could just be something simple.

Sep 01, 2009 | 1998 Dodge Ram 3500 2WD

1 Answer

Charging system


If you have changed the alternator and regulator, about all that could be left would either be a short circuit that is draining current away, or a bad ignition warning light bulb. That is because the power to energize the field of the alternator, comes through this dash bulb.

Jul 18, 2009 | 1984 Ford F 350

1 Answer

84 ford not charging


The only thing that comes to mind is electrical connections--battery cable connections (obvious, but worth mentioning) and all wiring to alt. and regulator, nothing loose, corroded? I'd also check the battery by swapping in something else that may fit, or having it tested. Yes, it's new, but I have seen (although rarely) a bad battery that was right off the shelf, wouldn't take a charge.

Nov 26, 2008 | 1984 Ford F 150

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