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Old May 17, 2011 | 03:03 PM
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Charging
ok guys I'm back. I have an 83 F250 w/ the 351W C6 4x4 all that fun stuff. heres my problem this time... The truck wont charge. it runs completely off the battery. I've had the alternator checked. It's fine (had 2 separate places check it) the voltage regulator and battery are both brand new. I did check the fuses none were blown. the fusable links all seemed to be fine also. I did however find a section of wire that was ate up with corrosion, and replaced that (making sure that the wires were matched up correctly too)

So those are the symptoms, now any diagnosis??
 
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Old May 17, 2011 | 04:20 PM
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Take a voltmeter and with the truck off, check for battery voltage on the large output wire lug on back of the alternator.
 
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Old May 17, 2011 | 05:05 PM
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with truck off it says 12.16 volts.
 
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Old May 17, 2011 | 08:54 PM
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Go to the regulator. On the "s" terminal should be a green/red wire. With the key off, you should have zero volts. With the key on, engine running, you should have 12 volts on this terminal.

With the key off, engine off, you should have 12v on the yellow "A" wire on the regulator also.
 
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Old May 17, 2011 | 09:12 PM
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ok ill try it in the mornin hopefully this works.
 
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Old May 18, 2011 | 08:37 AM
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ok so "S" with truck off had 0 volts. with truck on it had 9.48 volts. and the "A" with truck off had 12.03 volts and on it had 11.40 volts.
 
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Old May 18, 2011 | 08:42 AM
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I have a 3-point voltmeter test that works every time;


Let me know if this helps.
 
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Old May 18, 2011 | 10:00 AM
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i tried what the picture said too and off it had 12.41 volts the non load had 12.39 volts and the loaded test had 11.81 volts... but i cant find anywhere where it says anything if it drops like that so again im lost.
 
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Old May 18, 2011 | 10:17 AM
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Originally Posted by JJray
i tried what the picture said too and off it had 12.41 volts the non load had 12.39 volts and the loaded test had 11.81 volts... but i cant find anywhere where it says anything if it drops like that so again im lost.
I have the regulator test at home in my books. I'll have to find it, scan it and post it for you. If I have any other relevant pages I will do the same and post them here;
Ford Truck Enthusiasts Forums - Grubbworm's Album: Troubleshooting help, for anyone that needs it.
 
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Old May 19, 2011 | 07:05 AM
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I have added more troubleshooting pages and am going to add more here;
Ford Truck Enthusiasts Forums - Grubbworm's Album: Troubleshooting help, for anyone that needs it.

Here are some that might help you now;



 
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