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Fisher MM1 (no down/dump) 2 plug

Discussion in 'Fisher Engineering Discussion' started by ducaticorse, Nov 28, 2012.

  1. ducaticorse

    ducaticorse PlowSite.com Addict
    from we
    Messages: 1,426

    I just hard wired truck side (no module). I drained fluids and purged the system, cleaned filters and recharged. Plow angles and lifts strong and fast but it doesnt drop. I didnt know which solenoid controls dump/down so I pulled the top two on the block and the plungers seemed to move appropriately. I couldnt check the bottom one (third) because I didnt have a deep enough socket with me.

    Please advise, any hints or advice would be great, and WHICH DAMN SOLENOID CONTROLS DUMP/DOWN?
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  2. ducaticorse

    ducaticorse PlowSite.com Addict
    from we
    Messages: 1,426

    Managed to find out what solenoid/coil it is. Solenoid seems proper, now need to test the coil.
     
  3. stillen

    stillen Senior Member
    Messages: 247

    my plow wouldnt go down, i had a bad ground wire that went to solenoids..... when you check it, be aware of where your feet are
     
  4. ducaticorse

    ducaticorse PlowSite.com Addict
    from we
    Messages: 1,426

    LOL, it's up on blocks at the moment....
     
  5. ducaticorse

    ducaticorse PlowSite.com Addict
    from we
    Messages: 1,426

    Solenoid and coil are good... Checking controller next.
     
  6. RepoMan207

    RepoMan207 PlowSite Fanatic
    from Maine
    Messages: 5,035

    Controller or wire going to that coil/valve. Joystick or Fishstik?
     
  7. ducaticorse

    ducaticorse PlowSite.com Addict
    from we
    Messages: 1,426

    Joystick...

    Getting back on it tomorrow. Took the day off today to pick up a tailgate sander and a grapple for by bobcat..
     
  8. plowguy43

    plowguy43 PlowSite Fanatic
    Messages: 5,269

    Had a similar problem with my MM1 SEHP 2 plug, started as you described but was intermittent. Then it wouldn't do anything but angle left, then it got stuck and wouldn't drop at all.

    Ended up being a bad circuit board on the fishstick, $100 and it worked fine again.:salute: