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Drain on Electrical System Loss of RPM's

Discussion in 'Fisher Engineering Discussion' started by FordFisherman, Oct 3, 2010.

  1. FordFisherman

    FordFisherman PlowSite.com Addict
    from 06611
    Messages: 1,593

    96 F350 PSD with MM1 SEHP. Especially when raising the plow, the plow will draw enough to lower the RPM's even when revving the motor. Batteries are 3 yrs old but good, new alternator, new plow motor and solenoid. Anyone run a high output alternator?
     
  2. Raconteur

    Raconteur Senior Member
    from MA
    Messages: 138

    Rule one - check the wiring including grounds
    Rule two recheck wiring including grounds .
     
  3. FordFisherman

    FordFisherman PlowSite.com Addict
    from 06611
    Messages: 1,593

    Done. I'm leaning toward replacing the batteries at the moment.
     
  4. dieseldog45

    dieseldog45 Junior Member
    Messages: 4

    Ordered a high output from jc whitney a few years back. Worked very well, had same issues. Cant remember amperage though,
     
  5. FordFisherman

    FordFisherman PlowSite.com Addict
    from 06611
    Messages: 1,593

    Plow was slow with drain middle of last season so I replaced the alt (test showed it was bad). New 130 amp alt but same draw. Got to be the batts...
     
  6. Big Dog D

    Big Dog D PlowSite.com Addict
    Messages: 1,134

    Double check your grounds. Take them apart and really clean them, verify that the grounding stud that goes into the SEHP is secure. It sounds like a ground issue.