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led problem

Discussion in 'Strobe Lighting' started by bru z71, May 30, 2016.

  1. bru z71

    bru z71 Senior Member
    Messages: 121

    ok so i am wiring up a 50 inch light bar in my truck and 2 7 inch ones in the rear and when i turn the rear ones on they make a buzzing noise they are not on a resister just switchs and relays i ran 16 gauge wire to everything could that be the problem no resister ? or any other suggestions the operation volts are 10 to 30 if i do need a resister how do i size it by wire or volts ?
  2. Randall Ave

    Randall Ave PlowSite Veteran
    Messages: 3,598

    The lights are buzzing? Connect them directly to the battery, see if they buzz. If no buzzing, you have a low voltage supply, or bad common [ground].
    Good quality lights, or China?
  3. BossPlow2010

    BossPlow2010 PlowSite.com Addict
    Messages: 1,069

    Is the truck running when you turn everything on or is the truck only on?
  4. muddertrucker

    muddertrucker Junior Member
    Messages: 2

    How do you have it grounded? What size amp are you using with the relay? The buzzing noise is certainly not normal. Does it happen to be a Torton brand bar? They seem to have high reports of this and the issue is often within the light bar.
  5. Philbilly2

    Philbilly2 PlowSite Veteran
    Messages: 3,797

    I would put money on the ladder.

    Seems like the cheap eBay led stuff buzzes every time.