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Meyer module question

Discussion in 'Truck & Equipment Repair' started by gmcplowtruck, Nov 16, 2010.

  1. gmcplowtruck

    gmcplowtruck Member
    Messages: 48

    I have a 2004 dodge ram and about two weeks ago my marker light were on and I was unable to shut them off so I pulled the fuse left it out for a few days put it back in everything seemed fine now it did it again could this be the modules thanks
     
  2. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Just the plow markers get stuck on...or all the markers get stuck on?
     
  3. gmcplowtruck

    gmcplowtruck Member
    Messages: 48

    The plow isn't on the truck right now it's the truck markers it seems like it's when it's wet outside too
     
  4. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Wouldn't be caused by the plow modules then. Sounds more like the classic and very common sign of corrosion in the trailer plug connector. Fix many stuck brake lights, blinkers than won't, and markers that stay on by replacing the trailer connector due to excessive internal corrosion. Especially common to the later model Dodges. :nod:
     
  5. gmcplowtruck

    gmcplowtruck Member
    Messages: 48

    So how do I check it or repair it do you mean the trailer harness near the bumper thanks
     
  6. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Yes, trailer plug at the bumper. You'll probably find corrosion either in the front or rear side of it.
     
  7. gmcplowtruck

    gmcplowtruck Member
    Messages: 48

    Ok I'll check thanks
     
  8. gmcplowtruck

    gmcplowtruck Member
    Messages: 48

    ok i took trailer plug out of bumper and disconneted it there is no corrosion at all any other suggestions
     
  9. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Replace the park lamp relay. Should be in the under hood panel and labeled as such.
     
  10. gmcplowtruck

    gmcplowtruck Member
    Messages: 48

    Already ahead of you got a new relay and as soon as I put it in the lights came back on I am at a lost I have no idea what it could be
     
  11. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Pull the park relay out and probe the pin sockets with a test light with the headlamp switch in the OFF position.

    Two sockets should show voltage, one should show neither power or ground, and the fourth one should NOT show ground with the headlamp switch off. If it does then either the headlamp switch is defective or the forward lighting control module is defective.
     
  12. MahonLawnCare

    MahonLawnCare Senior Member
    from Ohio
    Messages: 851


    I'm having that issue, park lights on both truck and plow stay on. unhook 12v power source at battery problem solved. thinking module?