2007 WS Jake issue

Discussion in 'Trucks [ Eighteen Wheelers ]' started by djjawknee, Aug 16, 2020.

  1. Aug 16, 2020 #1
    djjawknee

    djjawknee Bobtail Member

    4
    2
    May 14, 2020
    0
    I'm having an issue with my 2007 Western Star Jake Brake. Think I have a short somewhere, I unplug rocker switch and plug back in. Start up truck and Jake works when rev up engine 3-6 times then stops. Shut off truck and repeat. Unplug and plug back in, same thing. Changed rocker switch and no change. Computer says my Jake's turned off. Problem with ECM maybe? Any help appreciated
     
    djjawknee, Aug 16, 2020
    djjawknee, Aug 16, 2020
    #1
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

  3. Aug 16, 2020 #2
    Old Man

    Old Man Road Train Member

    4,597
    13,471
    Apr 3, 2009
    Oklahoma City, OK
    0
    What motor?
     
    Old Man, Aug 16, 2020
    Old Man, Aug 16, 2020
    #2
  4. Aug 17, 2020 #3
    djjawknee

    djjawknee Bobtail Member

    4
    2
    May 14, 2020
    0
    Detroit series 60
     
    djjawknee, Aug 17, 2020
    djjawknee, Aug 17, 2020
    #3
  5. Aug 17, 2020 #4
    Old Man

    Old Man Road Train Member

    4,597
    13,471
    Apr 3, 2009
    Oklahoma City, OK
    0
    Might be engine wiring harness, they wear and chafe.
    Try this, take the big plug out of the ecm, it is on the engine facing the fire wall, longest plug on that side, clean it with electrical cleaner, the wires that are just above the notch( you’ll understand) are for the jake, take a small plastic tool and push them in from the wire side. May just need to tighten screw in the plug.
    Good luck
     
    Old Man, Aug 17, 2020
    Old Man, Aug 17, 2020
    #4
    djjawknee Thanks this.
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

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