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  1. N

    1978 Johnson 150 hp tach wire

    they are purple, grey, and black. was plugged into the other control. So grey is tach, black is ground, and purple is 12volt?
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    1978 Johnson 150 hp tach wire

    I try hard, but at 72 years old, it's not as easy as it used to be.
  3. N

    1978 Johnson 150 hp tach wire

    I had a spare shifter and noticed it had a harness on it at that plug. Do you know what wires go to what? Purple, grey, and black.
  4. N

    1978 Johnson 150 hp tach wire

    I appreciate all the help from everyone. Thank you.
  5. N

    1978 Johnson 150 hp tach wire

  6. N

    1978 Johnson 150 hp tach wire

    control box pic above
  7. N

    1978 Johnson 150 hp tach wire

  8. N

    1978 Johnson 150 hp tach wire

  9. N

    1978 Johnson 150 hp tach wire

    I'm looking to hook up a tach on my 1978 Johnson 150 hp. I keep reading about a grey wire. This is a V6 motor and has two control boxes. Any help is appreciated.
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