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2014 Cascadia, sounds like the Turn signals are on

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Opus, Feb 28, 2020.

  1. Feb 28, 2020 #1
    Opus

    Opus Road Train Member

    16,303
    91,347
    Dec 18, 2011
    South GA
    0
    Change to accessories, goes off.
    Turn to off, goes on.
    Start and run goes off, but comes back on.

    No lights, just the steady clicking like the turn signals are on

    Any ideas?

    Actually, the trailer lights flash.
    But not on accessories, just off.
     
    Opus, Feb 28, 2020
    Opus, Feb 28, 2020
    #1
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  3. Feb 28, 2020 #2
    Lab work

    Lab work Medium Load Member

    551
    669
    Apr 20, 2018
    USA
    0
    Seems like ignition switch is faulty.
     
    Lab work, Feb 28, 2020
    Lab work, Feb 28, 2020
    #2
  4. Feb 29, 2020 #3
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

    1,780
    1,726
    Jun 14, 2009
    romulus,mi
    0
    Remove cover from SAM chassis module on driver firewall. Remove every relay one at a time checking for corrosion. If nothing found, remove wire plugs on bottom of SAM looking for corrosion on pins. New SAM not hard to replace,but has to be programmed on the truck at a Freightliner dealership if you don't have fully unlocked DDDL 8.0 or higher.
     
    QUALITYTRUCK, Feb 29, 2020
    QUALITYTRUCK, Feb 29, 2020
    #3
    jsnell, spsauerland, gentleroger and 1 other person Thank this.
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