Tachometer help?

untochable915

Recruit
Joined
Apr 15, 2010
Messages
4
I have an 04 rinker 232, 5.0 mpi. my tach was not working when i got the boat so i took the plug off the back of the tach tested the wires purple was 12v. blue was 12v. and the grey wire was 12v also is this right any suggestions. thanks. its a faria tach
 
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