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
⌃

The 12.7 adventure.

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Wanabe1, Jun 21, 2019.

  1. Jun 21, 2019 #1
    Wanabe1

    Wanabe1 Light Load Member

    88
    50
    Jun 17, 2019
    0
    This thread is ecm related and moves on from fuel knowledge in 12.7 motor questions thread.
     
    Wanabe1, Jun 21, 2019
    Wanabe1, Jun 21, 2019
    #1
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

  3. Jun 21, 2019 #2
    Wanabe1

    Wanabe1 Light Load Member

    88
    50
    Jun 17, 2019
    0
    Ok. For us following, we have pretty well ruled out fuel problems.we assume ..fuel is passing injectors but motor only runs on either. Check on ecm power revealed ecm not grounded by harness. Harness changed as much as possible to original. Possibly now somebody will be able to find the ecm fuse if they want to look for it. However motor will still crank but not start. And run 9nly on either but I am done with the either.
     
    Wanabe1, Jun 21, 2019
    Wanabe1, Jun 21, 2019
    #2
  4. Jun 21, 2019 #3
    Wanabe1

    Wanabe1 Light Load Member

    88
    50
    Jun 17, 2019
    0
    I check SRS sensor but I find 132 ohms. I check continuity on wires. Have continuity. Put sensor in plug. Test from vehicle interface harness. Get like 124 ohms. I found a trouble shooting article to learn this. The article says something about checking gap between sensor and gear, but I don't see how to do this.
     
    Wanabe1, Jun 21, 2019
    Wanabe1, Jun 21, 2019
    #3
  5. Jun 21, 2019 #4
    Banker

    Banker Road Train Member

    4,356
    13,447
    Aug 19, 2012
    0
    Since you are having electrical problems I will share my experience with you. May help, may not. Underneath my battery box which is only visible when crawling underneath the rig there is a fuseable link going to my ECM. Corrosion caused 2 of the 3 fuses to loose connection and when I hit a bump going down the road it died completely. My issue doesn’t sound like yours, but something like this could be your ground issue. I also found a ground jumper wire from one battery to the next had rubbed thru to the wire on the bottom side. It often doesn’t take much to cause electrical issues to surface.
     
    Banker, Jun 21, 2019
    Banker, Jun 21, 2019
    #4
  7. Jun 22, 2019 #5
    Wanabe1

    Wanabe1 Light Load Member

    88
    50
    Jun 17, 2019
    0
    Ya. Only one wire needs fuses. The other 2 are grounds. Have that done up. Have checked SRS/ trs. Am changing ecms now to rule that out was just here takin a break for a minute.
     
    Wanabe1, Jun 22, 2019
    Wanabe1, Jun 22, 2019
    #5
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

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