Tachometer wiring diagram

Discussion in 'Chassis restoration' started by Weisguy184, Jun 25, 2020.

  1. Weisguy184

    Weisguy184 Well-Known Member

    I am adding a dash tachometer to my 1970 GS and removing the clock. I need a wiring diagram. Thanks.
     
  2. Weisguy184

    Weisguy184 Well-Known Member

    Thank you!
     
  3. edwood56

    edwood56 New Member

    So now I have another request and the back of my tach meter asks for a 12v supply but the diagram does not show it. I should say the Tachman revised mine for electronic ignition so I think (duh) I need to get a wire run from ignition.
     
  4. edwood56

    edwood56 New Member

    1972 It is a Pertronic ignition in a regular distributor. I see from the new OEM harness, there is a double pink wire with the female connector on the harness and I can connect it but I'm not sure a. if it for something else and why it is a double wire.
     
    1972GS likes this.
  5. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    All you need is ignition on 12 volts. The easiest way is to use a fuse tap.

    https://www.napaonline.com/en/p/NW_785131

    Or, you can probe any wire with a multi-meter or test light, and tap into the wire. I would use an additional fuse inline for better protection. The stock tachometer requires NO power, yours does. You don't need a wiring diagram.
     
  6. copperheadgs1

    copperheadgs1 copperheadgs1

    Did your car come with a rally clock? If it did the tach plug should already be there factory installed in wiring harness. Hood tach wires were often there taped above fuse box too.
     
  7. copperheadgs1

    copperheadgs1 copperheadgs1

    If your car did have the rally clock look for the tach connector. Don’t make it harder than it has to be.
     
  8. dreeesh

    dreeesh Well-Known Member

    that is for the speedminder
     
  9. 87GN_70GS

    87GN_70GS Well-Known Member

    Curious as to how much Tachman is charging nowadays for that conversion
     

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