"for info, the tach has 4 conn
"for info, the tach has 4 connections on the back
one says ign and has a pink wire going to it, it has power
one terminal has the ground, which is a black wire that connects in with the other gauges, the other gauges are working so I'm guessing it is grounded
one wire, blue which is for the back light it works
last connection on the back of the tach says sending unit, it is a gray wire and I have traced it back to the motor and has no cuts or nicks so the wire is good, the gray wire goes to a plug in the controller mounted beside the drivers seat, right below the key switch, then comes out and goes to the motor
I am pretty sure my sending unit is bad, help me locate it"