Truckers Report Jobs

Find Trucking Jobs

Company Driver Company Driver Dry Van Dry Van Flatbed Flatbed Refrigerated Refrigerated Specialized Specialized Owner Operator Owner Operator
More Trucking Job Searches ⌄ Fewer Trucking Job Searches
⌃

2012 Cascadia Traler ABS does't light up when key is on

Discussion in 'Freightliner Forum' started by mhyn, Feb 12, 2019.

  1. Feb 12, 2019 #1
    mhyn

    mhyn Road Train Member

    4,255
    4,513
    Dec 29, 2008
    Northridge, CA
    0
    Looks like my tractor doesn't communicate with trailer. Before the trailer ABS light would light up on dash when I would turn ignition on. Now it doesn't. Every time I brake trailer ABS light will come on and go off after braking. Checked all wires under trailer and they look ok. I have heard about PLC filter. Where is it located ? how to diagnose this problem ? thanks in advance.
     
    mhyn, Feb 12, 2019
    mhyn, Feb 12, 2019
    #1
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. Feb 12, 2019 #2
    ZVar

    ZVar Road Train Member

    10,911
    23,827
    Sep 10, 2010
    Flint, MI
    0
    Abs fuse under hood.
     
    ZVar, Feb 12, 2019
    ZVar, Feb 12, 2019
    #2
  4. Feb 12, 2019 #3
    mhyn

    mhyn Road Train Member

    4,255
    4,513
    Dec 29, 2008
    Northridge, CA
    0
    I have checked ABS fuse and ABS relay in SamChassis. They are good
     
    mhyn, Feb 12, 2019
    mhyn, Feb 12, 2019
    #3
  5. Feb 13, 2019 #4
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

    1,804
    1,765
    Jun 14, 2009
    romulus,mi
    0
    Check on driver frame rail roughly where back of cab ends,tucked behind air lines. Many zip ties to cut.
     
    QUALITYTRUCK, Feb 13, 2019
    QUALITYTRUCK, Feb 13, 2019
    #4
  7. Feb 13, 2019 #5
    mhyn

    mhyn Road Train Member

    4,255
    4,513
    Dec 29, 2008
    Northridge, CA
    0
    Checked. There is no PLC there.
    I just checked with millimeter and I see there is no +12v on central cavity of 7way plug when ignition is on.
     
    Last edited: Feb 13, 2019
    mhyn, Feb 13, 2019
    mhyn, Feb 13, 2019
    #5
  8. Feb 15, 2019 #6
    mhyn

    mhyn Road Train Member

    4,255
    4,513
    Dec 29, 2008
    Northridge, CA
    0
    my problem was a bad relay # 8 (this relay is not Trailer ABS relay, it's 30A fused power supply relay) on Sam Chassis. useful docs
     

    Attached Files:

    mhyn, Feb 15, 2019
    mhyn, Feb 15, 2019
    #6
    QUALITYTRUCK Thanks this.
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.