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Testing coils on Boss RT3

Discussion in 'Truck & Equipment Repair' started by ftimbo, Jan 2, 2012.

  1. ftimbo

    ftimbo Junior Member
    Messages: 5

    Boss RT3 no longer angles left or right. I can hear the pump working when I push the button but it does not swing left or right. I pulled the coils off the angle solenoid valve that control left/right and measured them with a multimeter. Both read 4.5 ohms. The other coils (up, down, and smart hitch) all read about the same. Is there a proper way to test the coils for magnetization? If they test OK, is there a way to test the angle solenoid valve?

    Thanks.
     
  2. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,943

    just pwr and gnd the 2 tangs, usually a screwdriver to see if they are working. pulling on the screwdriver.
    you could always switch the coils from up, down and hitch and see if it works left to right
     
  3. ftimbo

    ftimbo Junior Member
    Messages: 5

    took off the coils and tested with a screwdriver. they both magnetized and both are definitely working.

    I can't test the angle solenoid valve with the other coils.. the angle angle coils are a bit bigger than the rest.

    before I go ahead and take off one of the angle hoses to see if theres fluid moving.. is there anyway to test the angle solenoid valve itself? anything I should look for? cleaned it with air compressor and it looks fine, o-rings are all intact look fine.. anyway to test the thing while it's out of the plow?
     
  4. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,943

    Did you make sure you have pwr going to them when u angle left or right?
     
  5. ftimbo

    ftimbo Junior Member
    Messages: 5

    there is. about 11V going to the coil when button is pushed.
     
  6. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,943

    Hummmm ok. I assume u tested this with a meter instead of a test light?
     
  7. ftimbo

    ftimbo Junior Member
    Messages: 5

    Yes tested with a meter.
     
  8. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,943

    ok,,retry it with a test light.
     
  9. T-Trim

    T-Trim Senior Member
    from NE OH
    Messages: 207

    I believe all coils are the same. Which is one of the best parts of a Boss plow. Check all loose connections. Meaning the point at which the controller connects to or where the plow mounts at the 13 pin connector.
     
  10. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    If both coils tested ok for mag then the valve is likely the problem. Not uncommon for one to swell and jamb up after some hard use. You can remove it and stroke it's spool inward with a small screwdriver or pick to see if it stuck but it isn't a 100% valid test on these and usually requires simply replacing it.
     
  11. 2COR517

    2COR517 PlowSite Fanatic
    Messages: 7,115

    Why?........
     
  12. basher

    basher PlowSite Fanatic
    from 19707
    Messages: 8,992

    :confused::confused: why???
     
  13. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,943

    b/c a meter will not tell you if you have 12v loaded voltage going to your source. you can use a meter but it needs to be used with a test light as well. a meter will tell you no,,,but by itself it will never be able to tell you yes.
     
  14. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,943

    Now I'm guessing that the truck was running when he checked this?
    if it was,,shouldnt he be getting 14??? if it was tested with test light,,,the light might not even light up b/c there is to much resistance somewhere.
     
  15. basher

    basher PlowSite Fanatic
    from 19707
    Messages: 8,992

    So you suggest a test light as a load tester? Maybe with a cheap test light but today's LED units don't draw any more scarifical voltage then a mulit-meter. A coil would provide a much better amp sink.
     
  16. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,943

    A regular lighted test light is best for this type if test. An led light will not put enough of a load in the system
     
  17. basher

    basher PlowSite Fanatic
    from 19707
    Messages: 8,992

    If you want to do a load test, throw the multimeter in line. they are normally a 10volt/16watt coil they shouldn't overload the average Mmeter even if the system is only throwing 11 volts or they are 24watt coils.
     
  18. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,943

    I was kinda getting at, in a round about way,,,,why does he only gave 11v at the coil? Now don't get me wrong they will work as low as like 5v.... But 11v is low for a 12v system. Putting the meter in line is not going to test voltage. It would only test amps.
     
  19. basher

    basher PlowSite Fanatic
    from 19707
    Messages: 8,992

    Remember Occam's Razor, you're looking for Zebras. The concern here is not the voltage outside of its effect on the angle systems. Once we know the coils magnetize voltage/ampere/volt load are ill-relevant.

    Yes I agree the voltage is low. I would guess the truck was not running, and with the plow motor running the available voltage could be low.
     
  20. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,943

    From what I was rereading he never tested the coils back on the truck. Just want to make sure he has proper voltage in, and proper ground. Could be coils as well, or garbage in fluid