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2 plug plow to 3 plug truck

Discussion in 'Fisher Engineering Discussion' started by Mholubek, Oct 15, 2014.

  1. Mholubek

    Mholubek Member
    Messages: 47

    hi fellas!!

    mm1 sehp 2 plug plow...
    3 plug 4 port iso truck side..

    I understand, how to convert the plow side to 3 plug.
    basically separate the single 9 pin plug(3 control pins/6 light pins)

    my question is, im looking at the wiring diagram for the 11 pin light plug(truck side)..theres 2 "common" pins... what do I do with these??

    I understand the hi/low/turn/park/grounds
    (stock mm1 plow lights not intensifires.)

    thanks mike
     
  2. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,983

    Those are the headlight gnds. Iso uses gnds from each trk lights to gnd the plow lights.
     
  3. Mholubek

    Mholubek Member
    Messages: 47

    ok.

    then why is pin 2 and pin 7 (truck side..black/orange wires) labeled as grounds?
     
  4. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,983

    What set up are you referring to? The relay or Iso? Kinda lost me
     
  5. Mholubek

    Mholubek Member
    Messages: 47

    4 port iso, truck side wiring.
    11 pin harness(dated 2000)
     
  6. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,983

    Ok you talking the Iso wiring. Those 2 gnd wires goto the lights. Each light has there own
     
  7. Mholubek

    Mholubek Member
    Messages: 47

    yes iso wiring.

    heres what I have in front of me(bare with me lol)

    pin1 p/s low beam
    pin2 GROUND
    pin3 p/s high beam
    pin4 d/s high
    pin5 p/s COMMON
    pin6 d/s low beam
    pin7 GROUND
    pin8 left turn
    pin9 right turn
    pin10 parking lights
    pin11 d/s COMMON
     
  8. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,983

    How's this work for you

    Screenshot_2014-10-15-18-30-27.jpg
     
  9. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,983

    Or these........

    Screenshot_2014-10-15-18-36-55.jpg

    Screenshot_2014-10-15-18-36-51.jpg

    Screenshot_2014-10-15-18-36-31.jpg
     
  10. Mholubek

    Mholubek Member
    Messages: 47

    cant really read it.

    are you saying theres 4 grounds going thru that plug? 2 to each light?

    I have 5 wires each out of plow lights. high/low/turn/running/ground.
    that's 10 wires.
    they share the running light feed(only one pin in truck side)
    that leaves 9 wires. connected. 2 "common" pins going no where
     
  11. Mholubek

    Mholubek Member
    Messages: 47

    2nd pics are alil better. thanks
     
  12. Mholubek

    Mholubek Member
    Messages: 47

    if it helps.
    theres no relays on truck side other than for pump motor.
    and I believe my control plug(in side cab) is a 6 wire
     
  13. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,983

    I thought no relays. Best I can give u on my phone. And you don't have enough posts to pm yet or I'd tell you to shoot me one
     
  14. Mholubek

    Mholubek Member
    Messages: 47

    Last edited: Oct 15, 2014
  15. NHresident

    NHresident Senior Member
    Messages: 285

    if ur set up all ready 3 plug on the trk for $130 u can get the 3 plug plow wire harness with 11 pins and just re wire the lights and if u have a straight plow blade another $75 and get the plow side control cable and ur good to go in about an hr if screws come out OK a little pricey BUT a lot easier
     
  16. Mholubek

    Mholubek Member
    Messages: 47

    I can get the 11pin plow site for 120..and the 3 pin control plow site for 50...

    which would be the way id go(am going)

    but ill still have the same "extra" wires/pins not hooked up...

    I was hoping someone would chime in and say that those "common" pins were for the newer plow lights...or day time lights
     
  17. Mholubek

    Mholubek Member
    Messages: 47

    Well..
    After doing some jumper wiring.(testing plow operations)
    I've gotten the plow to activate the pump motor on all control functions (except lower)..
    I get no left/right or lower...plow raises just fine..
    I verified that s1/s2/s3 are all getting power when called by controller (each sol.on manifold has a slight click when applying 12v)

    Assuming the poppet valve is acting up.
    I'll tear that apart after work. .

    Any advice?
    Tips/tricks?
    Thanks again for all your help guys!
     
  18. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,983

    You have common for each light fyi. Common (ground) for the parking lights and headlights so 2 grounds for each side. Just fyi
     
  19. Mholubek

    Mholubek Member
    Messages: 47

    Dieselss that's what I was figuring after your text last night I hoped on my computer and stared at those diagrams. ....bout went cross eyed! !

    Thanks again bud for taking the time
     
  20. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,983

    I can help.more on my.break