Breeze3at
Experienced Member
Historically, HD uses one wiring harness for each model line, for a given year. IE, all FXD--'s in year 2009 have the same harness. Unused connectors are just tucked away (it's cheaper and easier on the assembly line that way). So, if any Dyna of your year came with a tach from the factory, there should be a connector for it tucked away. Maybe in the headlight bucket?