I have a 1985 Yamaha, Model 150 ETLK, mounted on a Ebbtide 179 Dyna Trak.
I am attempting to install missing tachometer.
I have the following wires:
2 green wires tied together, which I think goes to the "signal" post.
1 black wire which, I'm sure is ground, goes to "Grnd" post.
1 purple...