Can anybody tell me how to locate the tachometer output wiring for a 2004 390 motoryacht? The owners manual show wiring that is not what is in my boat. The colors and wires shown in manual going to the gagues does not exsit. My guess is Sea Ray changed from decrete wiring to a bus system and did not update manuals. Need tachometer output to finish instaling a Garmin Autopilot. Thanks for any suggestions.
