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
⌃

TRLR Abs Comes On Within 1 Hour Of Driving

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Ker, Jul 15, 2021.

  1. Jul 15, 2021 #1
    Ker

    Ker Bobtail Member

    25
    16
    Mar 11, 2018
    0
    When I start driving, trailer abs comes on after 15-30 minutes and it stays on the whole day.

    Just changed both abs sensors(it's the model with 2 sensors)-didn't help.
     
    Ker, Jul 15, 2021
    Ker, Jul 15, 2021
    #1
    Rideandrepair Thanks this.
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

  3. Jul 15, 2021 #2
    Snailexpress

    Snailexpress Road Train Member

    2,675
    6,069
    Apr 28, 2014
    Rocky
    0
    Did you clean tone rings and adjust hub bearings?
     
    Snailexpress, Jul 15, 2021
    Snailexpress, Jul 15, 2021
    #2
    Rideandrepair Thanks this.
  4. Jul 15, 2021 #3
    Rideandrepair

    Rideandrepair Road Train Member

    17,451
    56,621
    Aug 8, 2015
    0
    Maybe sensors aren’t pushed in far enough? Most likely a wire issue from sensor to ecu. Turn key on, for 1-2 seconds, then off, 1-2 seconds, on for 1-2 seconds, off 1-2 seconds, then on. Count flashes on trailers yellow light. Depending on which way the ecu is mounted. If mounted with wires plugged in facing front of trailer, 4 flashes is left (Drivers side) sensor/ wire issue,6 flashes is right,(passengers side) sensor/wire issue. If ecu is mounted opposite ( with wire harness plugs facing rear of trailer) 4 flashes is right sensor/ wire. 6 flashes is left wire/sensor. I’m guessing an easy way to find out,if it’s a sensor/ and or wire issue, is to switch wires plugged in at the ecu. If 4 flashes becomes 6, of 6 becomes 4. You’ll know for sure it’s just a wire or sensor issue. Not some other ecu, or some other wiring or ecu issue.
     
    Rideandrepair, Jul 15, 2021
    Rideandrepair, Jul 15, 2021
    #3
    BoxCarKidd Thanks this.
  5. Jul 15, 2021 #4
    Rideandrepair

    Rideandrepair Road Train Member

    17,451
    56,621
    Aug 8, 2015
    0
    Good point, if hubs loose, it will push sensor away from tone ring.
     
    Rideandrepair, Jul 15, 2021
    Rideandrepair, Jul 15, 2021
    #4
  7. Jul 15, 2021 #5
    Rideandrepair

    Rideandrepair Road Train Member

    17,451
    56,621
    Aug 8, 2015
    0
    Each time you make a repair, or change a sensor/ wire. You must Pul the trailer at least 3-5 mph to make light go off. Sometimes you’ll have multiple problems. Light stays on, after fixing one problem. Need to do another flash code diagnosis to identify and get the next problem fixed.
     
    Rideandrepair, Jul 15, 2021
    Rideandrepair, Jul 15, 2021
    #5
  8. Jul 27, 2021 #7
    Ker

    Ker Bobtail Member

    25
    16
    Mar 11, 2018
    0
    Thank you guys so much, I'll try all these things and let you know if it worked.
     
    Ker, Jul 27, 2021
    Ker, Jul 27, 2021
    #7
  9. Jul 27, 2021 #8
    Ker

    Ker Bobtail Member

    25
    16
    Mar 11, 2018
    0
    I cleaned the tone rings really good , there was a lot of grease on them, didn't help.

    When I turn on/off key few times the yellow abs light flashed 3x6 , when I switched sides on ECU jacks it gave me the same (3x6) code again. Jacks are facing the front of the trailer thought.
     
    Ker, Jul 27, 2021
    Ker, Jul 27, 2021
    #8
  10. Jul 27, 2021 #9
    Ker

    Ker Bobtail Member

    25
    16
    Mar 11, 2018
    0
    Update.

    After switching jacks left to right and right to left I decided to leave it that way and drive couple of miles. When I stopped and did the ignition thing 3 times the yellow light blinked 3x4.

    That was a really smart way to diagnose Rideandrepair, thanks a lot!

    Thank you all for help, I really appreciate it

    I'll let you know if the new cable helped.
     
    Ker, Jul 27, 2021
    Ker, Jul 27, 2021
    #9
    Heavyd Thanks this.
  11. Aug 24, 2021 #10
    Ker

    Ker Bobtail Member

    25
    16
    Mar 11, 2018
    0
    Problem solved accidentally.

    I decided to change the suspension bushings on the trailer, after this the abs light turned off and I never had problems again. Does anyone know what's the reason for this?

    Yeah, one more thing, after installing the new bushings, this mechanic torqued my tires so strong, I would say much higher than what it supposed to be=450-500 ft lbs he didn't use the torque wrench, just the gun, which I don't think is good but that might be reason for fixed abs, I don't know, you tell me?

    I know for fact that it was over torqued because I tried to take my wheels off using my 3/4 impact and there was NO WAY, (which was never the case when my wheels were torqued to 450-500)
     
    Ker, Aug 24, 2021
    Ker, Aug 24, 2021
    #10
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

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