06 vnl780 no tach

Discussion in 'Volvo Forum' started by Icky904, Oct 23, 2018.

  1. Icky904

    Icky904 Bobtail Member

    1
    0
    Nov 6, 2017
    0
    Guys i have a 06 vnl780 with a cummins isx and the tachometer has not worked since i bought it. Where does the tach read the rpms from so i can try and track down the problem (sensors, etc) Ive read some people needed to clean connectors to the ecu.. I dont even know where the ecu is located on this thing. If I find out my dash cluster is bad, is it possible to buy an aftermarket tach and just mount it on the dash?

    ***update***

    I ran a test of gauges and all gauges move/work except tach
     
    Last edited: Oct 24, 2018
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

  3. benrab

    benrab Medium Load Member

    326
    238
    Apr 5, 2015
    Quebec ,Canada
    0
    With the test that you did. Cluster self test you have your answer already. Cluster is defective. The cluster use the engine Data Link signal J1939 and J1587 to run.
     
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

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