91 F250 not charging!!

Discussion in 'Ford Truck Forum' started by Fordpowa, Nov 3, 2017.

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  1. Fordpowa

    Fordpowa Member

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    hi all new to the forum thing but kind of at a loss, I have a 91f250 with a 5.8 in it, so the story is my truck was running perfect for the last month ( when I bought it) never had any problems just some minor leaks I repaired, but we got a big snowfall a few days ago so I parked the truck it's been sitting since.. about 3 days. I go out today to go start it and the battery is dead (haven't had this problem yet) so I jump it get it running to find the battery light is on and it's not charging, I figured cold out battery dead could possibly be frozen so I replaced the battery and alternator to find the same problem.. what could've happened in 3 days of sitting that would cause charging issues??? And any wiring schematics would be appreciated as well
     
  2. Fordpowa

    Fordpowa Member

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    Truck has the m5od trans not sure if it's any help!!
     
  3. leolkfrm

    leolkfrm Full Member

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    check all connections for corrosion, make sure teh belt is not slipping/squealing
     
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  4. Kennyray

    Kennyray Moderator
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    I may be wrong but doesn't that truck have a seperate voltage regulator?
     
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  5. Fordpowa

    Fordpowa Member

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    Checked for corrosion everything seems good, grounds are good and belt is tight, an also the voltage regulator is on the alt.
     
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  6. leolkfrm

    leolkfrm Full Member

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    read the voltage on battery, then start truck and check it again, post results
     
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  7. Fordpowa

    Fordpowa Member

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    12 volts off 11 volts running
     
  8. dirtrider73068

    dirtrider73068 Senior Moderator
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    I would check all wires to do with the chargeing system, check every connection, I know you said you did this, but be very through with it, make sure the connections are clean and corrosion free and tight, make sure nothing is green in color on the wires thats corrosion and adds resistence.

    With it running it should show 14.5 on a meter.
     
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  9. Fordpowa

    Fordpowa Member

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    So this is the inside of one of the plugs off the alt. It's full of this sticky yellow s@@t, not sure what it is but could possibly be an issue?
     

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  10. Fordpowa

    Fordpowa Member

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    I also checked continuity on all wires from alt - solenoid and there is no broken wires continuity to everything even the one that loops from the one plug to the other
     

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