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Testing Solenoid control

Discussion in 'Western Plows Discussion' started by wls, Oct 15, 2008.

  1. wls

    wls Senior Member
    Messages: 319

    I bought a used unimount the other day, got the undercarriage on, and bought/installed a new wire harness, actually had a ex snoway, now mechanic do the work. Anyways got it home to hook up the plow, lights all work great. So I assume the wiring is correct, when I hooked up the control (joystick) to the underdash hookup, the light came on etc. But nothing happened when I moved the joystick control, up/down or either side. I took the back off the control, and the circut board looks like it is burnt up alittle, looks like I may have to get another one, is there a way to see if thats the problem, like taking a jumper wire to the underdash, truck side connector?
     
    Last edited: Oct 15, 2008
  2. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Jump pins 1 and 4 in the under dash connector with a jumper and listen for the solenoid to click and the pump to run.
     
  3. wls

    wls Senior Member
    Messages: 319


    Will try it tomorrow, after I get my salter picked up. thanks
     
  4. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Here's the harness side connector end view so you know which pins your looking for...
     

    Attached Files:

  5. wls

    wls Senior Member
    Messages: 319

    OK thanks alot.
     
  6. wls

    wls Senior Member
    Messages: 319

    Went out and checked, when I had the jumper wire in 1+4, nothing really happened, but if I left it in 4, and touched 2,5,and 6 the motor ran, also one of them made the blade swing to the right (pass side). When it was left in 4, and i touched 3 nothing happened either.
    Now what, thanks
     
  7. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    The controller's defective.
     
  8. wls

    wls Senior Member
    Messages: 319

    when I had the 1and 4 jumped together, should the motor have run?, it did'nt do anything.
     
  9. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Yes it should because your simply jumping the red 12V wire in pin #1 directly to the under hood solenoid trigger wire (#4). But if the pump ran when you tried other pins then either you just had the pins reversed or your connection wasn't quite good enough.

    The fact that you were at least able to make the pump run (and even angle at one point) tells you that the wiring, under hood solenoid, and pump are all functioning fine. Nothing left but the controller.
     
  10. wls

    wls Senior Member
    Messages: 319

    OK thanks, I have a new controllor coming, or I should say a new circut board coming. thanks again.
     
  11. wls

    wls Senior Member
    Messages: 319

    well I got the new controllor, but there now a clicking sound coming from where the poppet valves go, down inside the valve body, now what? thanks
     
  12. wls

    wls Senior Member
    Messages: 319

    Got another question, I took the motor off, hooked up a battery charger, ran great, nice and smooth/quite. Bolted back uo, hooked charger to it, it sounded like it was just humming, so I took it back off, turned the pump by hand, could turn it fairly easy clockwise, but ccw, it would turn easy for 1 1/2 turn then freeze up? What direction does the pump turn? any ideas, thanks
     
    Last edited: Oct 25, 2008
  13. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    A battery charger wont supply enough amps to run the motor with a load on it (ie attempting to turn the pump).

    Jump the two large posts on the under hood solenoid with a set of jumper cables briefly. Does the motor run then?
     
  14. wls

    wls Senior Member
    Messages: 319

    Barely, Looking at the motor (shaft) when I put 200 amps to it, it just rotated about 2-2 1/2 turns, you could see the revolutions, sounded like a heck of drag. My lights in the shop would flicker. When charger unhooked, just clicking sound when you move the controllor (joy stick)
    Wanted to add, when I jumped the wiring harness, from the motor to where it would plug in to the body harness, it turned over fine, so from the plow harness to the motor is good. Thanks
     
    Last edited: Oct 26, 2008
  15. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    If I'm following your explanation correctly it sounds like the under hood solenoid is defective. Jump it RIGHT AT THE TWO LARGE TERMINALS ON THE UHS and see if it runs. If it does then the UHS is defective.
     
  16. wls

    wls Senior Member
    Messages: 319

    when I hook the jumper to the 2 big lugs on the UHS, the motor barely tuns over, about 2 revs, then stops, real slow. so basically, the motor does'nt run. thanks
     
    Last edited: Oct 26, 2008
  17. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    And what happens what you run the jumper cables (including the ground) directly from the battery to the motor? If it run fine that way then you have a poor power or ground connection on the battery harness somewhere.
     
  18. wls

    wls Senior Member
    Messages: 319

    it was the ground, from the uhs to the body/battery ground, they had it to the pos side of battery. Thanks so much B&B
     
  19. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Good deal. :drinkup:


    And thats not at all uncommon...I fixed one again just yesterday that the DIY installer did the exact same thing. They see a mostly orange colored wire and assume it's a hot wire rather than checking the wiring diagram to know for sure.
     
  20. wls

    wls Senior Member
    Messages: 319

    exactly, thats probably why I did'nt think any different, thanks for all your help.