Results 1 to 4 of 4

Thread: Faulty Speedometer/Tach0meter

  1. #1
    Join Date
    Jul 2016
    Location
    Farmington
    Posts
    2

    Default Faulty Speedometer/Tach0meter

    Recently purchased an H3-40 Marathon Coach- Having issues with the speedometer and tachometer.
    It doesn't work- stuck at the current mileage. Any thoughts/suggestions??

  2. #2
    Join Date
    May 2012
    Location
    Beverly Hills
    Posts
    4,652

    Default

    What year is your coach?


    Gil and Durlene
    2003 H-3 Hoffman Conversion

  3. #3
    Join Date
    Jul 2016
    Location
    Farmington
    Posts
    2

    Default

    its a 1993

  4. #4
    Join Date
    May 2012
    Location
    Beverly Hills
    Posts
    4,652

    Default

    I'm pretty sure that even in 93 the speedometer and tach are driven by a signal from the DDEC. The actual speed sensor may be on the transmission, but the signal comes through the DDEC. If they both failed at the same time I would suspect a communications problem and look first at the wiring cinnections.


    Gil and Durlene
    2003 H-3 Hoffman Conversion

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •