Evinrude tach wiring?

[81 beachcomber]

got the wire harness coming out of the control box for the tach plug. 1995 70hp with the new "big red plug" style control box.

Anyways, grey wire black wire and a purple.

grey-positive?
black-negative?
purple signal?

 

[blimp]

Re: Evinrude tach wiring?

grey- signal
black - ground
purple - positive