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No power

Discussion in 'Western Plows Discussion' started by Greenstar lawn, Jan 6, 2015.

  1. Greenstar lawn

    Greenstar lawn Senior Member
    Messages: 405

    Western ultramount straight blade. 4 plug module that goes to a 3 plug out my grill.

    I goto hook up my plow last night and I had no power. I found i had a blown 15 amp fuse that I replaced last night and still nothing. My headlights don't even switch over. Could a bad controller be the cause?
     
  2. mishnick

    mishnick 2000 Club Member
    Messages: 2,243

    That 15 A fuse is the main feed to the 4 port isolation module. Schematics don't show the inside of the iso module so its difficult to say why the fuse blew. There is another power feed that must be hot as well for the system to boot up. It comes from an ignition source, depending on the model and year of vehicle it could tap into a fuse box under the dash or in the engine compartment. To see if it's good you can just disconnect plug #1 from the isolation module. Pin C (solid red wire) on the plug (not the iso module pins) should be hot 12V when the key is on. Pins F and G should be hot all the time, they are powered by the 15A and the 7.5A fuses which are only a few inches from the plug, you changed the 15A you said... If the red wire is not hot with ignition follow the controller cable under the dash to find the red wire where it separates from the main harness. From there follow the red wire to whatever ignition source it is connected to and see why it's dead. Maybe a fuse or perhaps the wire is just pulled off.

    If that's not the problem I would be checking pin 7 of the 11 headlight plug (truck side) at the grill with the ignition switch on. This is the wire that tells the module that the plow is present. If there is no power at pin 7 at the grill when the key is on then I would say the 4 port isolation module is toast.

    Here is a link to the Western schematics manual. Look at page 33 for your setup. You will also find guides to the pin numbers & letters that I made reference to if you can't see markings.

    Hope that helps.
     
  3. Greenstar lawn

    Greenstar lawn Senior Member
    Messages: 405

    This Helps me out tremendously. I can't see the link you put though? Again thanks
     
  4. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,933

  5. Greenstar lawn

    Greenstar lawn Senior Member
    Messages: 405

    You guys rock. Thank you both
     
  6. mishnick

    mishnick 2000 Club Member
    Messages: 2,243

    Oops, sorry.... I forgot to past that link. Thanks DieselSS that's exactly the link I was suggesting.
     
  7. Greenstar lawn

    Greenstar lawn Senior Member
    Messages: 405

    Ended up be a bad module. Charged me $600 to put a new one in
     
  8. mishnick

    mishnick 2000 Club Member
    Messages: 2,243

    $600 for a module! They must have spent a couple hours troubleshooting.....
     
  9. Greenstar lawn

    Greenstar lawn Senior Member
    Messages: 405

    About 1.15 hrs they had it for.
    Minimum of 1 hr to trouble shoot at $90 hr
    Minimum of 1 hr for labor at $90 an hr
    Plus $$ for parts
     
  10. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,933

    Not trying to kick a guy being down, but that don't seem right.
    How long to actually replace the module?
    Your 1,15 @90.00. Is only 103.00
     
  11. Greenstar lawn

    Greenstar lawn Senior Member
    Messages: 405

    No they charged me 2 full hrs. 1 hr to trouble shoot plus 1 hr for labor. All together I was there for 2 hrs but they probably worked on my truck for a little over an hr. So $180 for labor.

    Then when I left my truck stalled every time I let off the gas. I limped home and called them to tell him and he told me it was doing that when I brought it in. Which I can assure u it wasnt. So he basically said it was my problem. Now I'm gonna clean the throttle body to see if that helps. I'm pissed
     
  12. mishnick

    mishnick 2000 Club Member
    Messages: 2,243

    They probably disconnected the MAP or MAF sensor. Look for a loose cable....