VDO Tach Wiring

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  • siii8873
    Overdrive
    • Jul 2007
    • 1011
    #1

    VDO Tach Wiring

    I have a VDO tach with three terminals on the back that I want to install. The terminals are as follows, am I correct as where to wire this up;

    + switched power from the ign switch
    - Ground
    G Negative side of coil (this is the one I'm unsure of)


    Thanks
    Bob
    THING 1 - 1973 88 SIII - SOLD
    THING 2 -1974 88 SIII Daily Driver - SOLD
    THING 3 - 1969 88 SIIA Bugeye Project
    THING 4 - 1971 109 SIIA ExMod - SOLD
    THING 5 - 1958 109 PU
    THING 6 - 1954 86" HT
    Tags: None
    • disco2hse
      4th Gear
      • Jul 2010
      • 451
      #2
      Mostly, I have seen them attached to the W post on the alternator: like this.



      This indicates three types, so which is yours?

      Alan

      109 Stage 1 V8 ex-army FFR
      2005 Disco 2 HSE

      http://www.youtube.com/user/alalit

        Comment

        • siii8873
          Overdrive
          • Jul 2007
          • 1011
          #3
          the back of mine looks like the middle left one on the top diagram. I'll have to check the back of my LUCAS alternator to see if it has a "W" terminal.
          thanks
          THING 1 - 1973 88 SIII - SOLD
          THING 2 -1974 88 SIII Daily Driver - SOLD
          THING 3 - 1969 88 SIIA Bugeye Project
          THING 4 - 1971 109 SIIA ExMod - SOLD
          THING 5 - 1958 109 PU
          THING 6 - 1954 86" HT

            Comment

            • busboy
              2nd Gear
              • Nov 2012
              • 202
              #4
              Mine is just off the neg on the coil, don't know the tach manufacturer though.
              1971 series 2a 88, series 3 trans, Fairey OD, owned since 1978.

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