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Electric brake controller

Discussion in 'Volvo Forum' started by exfarmer, Feb 24, 2013.

  1. Feb 24, 2013 #1
    exfarmer

    exfarmer Bobtail Member

    22
    2
    Apr 27, 2011
    Humboldt,Sk
    0
    Can anyone tell me where to get power to activate a controller on a 2003 780? The brake light switch breaks the circuit when it is applied, unlike most trucks that close the circuit and give a live wire to activate the controller.
     
    Last edited: Feb 24, 2013
    exfarmer, Feb 24, 2013
    exfarmer, Feb 24, 2013
    #1
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  3. Feb 24, 2013 #2
    workin' for a livin'

    workin' for a livin' Bobtail Member

    28
    9
    Feb 17, 2013
    0
    Check the ground wire first. If you ever have an electrical problem chase down the grounds. All of them. Takes a bit of time but fairly simple. 9/16" and sandpaper. But to directly answer your question, no, I do not.
     
    workin' for a livin', Feb 24, 2013
    workin' for a livin', Feb 24, 2013
    #2
  4. Feb 25, 2013 #3
    Pablo-UA

    Pablo-UA Road Train Member

    7,604
    1,642
    Oct 11, 2010
    Borispol, Ukraine
    0
    On all volvo truck pressure switch is used to actuate brake light (wires run to LCM) and pedal switch is used for cruis control
     
    Pablo-UA, Feb 25, 2013
    Pablo-UA, Feb 25, 2013
    #3
  5. Feb 25, 2013 #4
    exfarmer

    exfarmer Bobtail Member

    22
    2
    Apr 27, 2011
    Humboldt,Sk
    0
    Ok. Do you know where the pressure switch is located?
     
    exfarmer, Feb 25, 2013
    exfarmer, Feb 25, 2013
    #4
  7. Feb 26, 2013 #5
    Pablo-UA

    Pablo-UA Road Train Member

    7,604
    1,642
    Oct 11, 2010
    Borispol, Ukraine
    0
    somewere under sleeper of left frame rail on cabovers and seems to be the same place ore under hood on cabovers. Marked as S48 pressure switch, calibrated to 0.4 BAR
     
    Pablo-UA, Feb 26, 2013
    Pablo-UA, Feb 26, 2013
    #5
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