Try to make it quick and simple. Have a 2003 Dyna 100th, second one. Had a tach on the first one and want this one to have one also. Have the chance to but a new H/D tach for a 2004 883. Know this harness will not work, but will the tach itself work? Can I pull necessary wires from this unit and adapt to the Dyna? Thanks for your input and suggestions.