I have a 68 and a 69 hood tach. The 68 has black, pink and white wires going into the tach mechanism. The 69 has just black and brown wires. I assume the black wire is ground and in the case of the 69 the brown wire should go to the negative side of the coil. I don't know about the 68. Anybody know how to wire these things up? I can't get either of them to work!
Thanks
Mike
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