Inop VDO Tachometer

Discussion in 'Class A / Diesel Pushers' started by bluestarhp, Mar 26, 2010.

  1. bluestarhp

    bluestarhp New Member

    Have a 1999 American Dream by Fleetwood with Allison 6-Speed, Cummins 330.

    Inoperative VDO Tachometer has local mechanics stumped.

    First trip out, Tachometer functioned normally, but Speedometer was inoperative.

    Return trip from re-fueling, the Speedometer and tachometer were normal.

    Tachometer failed shortly thereafter.

    Mechanics replaced Allison sending unit = no Tach.

    Installed new VDO like Tachometer = no Tach.

    Have schematic from Spartan, but mechanics are stumped.


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