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Alternator Amps Produced and Drawn

Discussion in 'The Garage' started by prossett, Apr 22, 2006.

  1. prossett

    prossett 1/2 ton status

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    I read from a search that the stock 83 Jimmy petrol engine alternator produces just 37 amps! Is this correct?

    Where do the amps go with a stock set-up? I also need to add the draw from three 55W lights, so 13.75 amps.
     
  2. 1985_K5_Silverado

    1985_K5_Silverado 1/2 ton status

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    Same in '85, 37 amp alt was standard, 66 amp was optional. With standard lights and whatnot, this was plenty. However, with high-current accessories, such as one or more electric cooling fans, huge stereo amps, hi-wattage driving lights, and so forth, it's easy to draw more than you make with all that non-standard stuff running.
     
  3. dyeager535

    dyeager535 1 ton status Premium Member

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    Draw would essentially have been the heater blower motor, radio, ignition system, and lights. That's base only of course.

    Heavy duty heater, AC, etc. would likely have resulted in a higher rated alternator.

    If the alternator is stock, Amp rating is stamped on the alternator case. Not always visible with the alternator installed IIRC.
     
  4. R77K10

    R77K10 Banned

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    time for a larger alt

    lots were 63 or 82 and others

    were billions of different alt amp ratings over the years in stock factory form

    can have a local battery or electric motor shop build one up for ya
     

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