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Tachograph problem

  • 22-08-2012 8:32am
    #1
    ianx
    Registered Users, Registered Users 2 Posts: 22 ✭


    I really hope someone can help with this as I am tearing my hair out trying to find someone to ask!

    I have a 2003 Mercedes Varion 7.5 ton fitted with a camper body, used for private transport.

    To prevent the batteries going flat when not in use we have an isolator fitted. When the isolator is screwed in (to make the connection) the speedo needle on the tachograph slowly goes from 0 round to maximum and stays there. If the front of the tacho is opened the needle drops back to zero but will then not read anything. It is as if the drive head stays at maximum even though the needle springs back to zero when the front is opened. The odometer part of the tacho works fine. I presume this is some kind of start up sequence but don't know how to reset it so that it works. The tachograph worked perfectly until the battery was disconnected to fit the isolator. Although we don't need to use the tacho as it is a private lorry this is our only speedometer.
    The tacho is an analogue Veeder Root model (I think model number e10) with switches for 2 drivers but I can't find anyone who knows about them.

    If there are any lorry drivers out there who remember the "old-style" tachos and know what the answer is then please let me know!


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