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does any one have a 81 bj wiring diagram for the alt?

Discussion in 'Diesel Tech / 24 volts' started by attatoy, Feb 21, 2007.

  1. attatoy

    attatoy

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    Feb 11, 2007
    i am lookin for this diagram to fault my alternator, it will raise voltage two volts around 2500 rpm, my belt is tight , and i belive the reg is fielding the the armature as i pulled the cover off to check brushes and they look good, continuity though armutur, and seems to have power on the other side of the armuture, i have been told blown diodes. how bad is this(price wise) to have repaired? any one know how t fault a rectifier? or reg, like i said a wiring diagram would be nice.

    thanx
    Myles
     
  2. ivanhoe

    ivanhoe

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    hi,
    bad diodes will discharge the batteries. if left too long on cold temperatures, it would freeze your batteries to useless batteries. any alternator shop will check and repair. i had it done a couple of times and it was not too much $$ mind you, the batteries was a set back!!!!:mad: bad regulator will prevent decent charging or over charging!
    hth,
     
  3. UpsideDown

    UpsideDown

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    Koksilah, Vancouver Island, BC
    Check your brush length.

    The brushes may look good, but if not long enough, they will float under load and not provide a charge. IIRC, the "new" spec is for something like 20mm of stick-out, but I should really check that one.