Join Date: Mar 2017
Location: Ojibwe Gichigami
Liked: 2776 times
The wiring diagram does not show where that green wire bolts down, its just a representative schematic of the circuits. So the location near the front of the bike sounds legit and frankly, frame ground location does not matter.
I'd troubleshoot those reverse inhibitor relay connections as explained in the manual next.
Have you checked all of the switches and their circuitry (neutral, reverse, ignition, kill switch, start switch, light switches, etc.) on the bike yet? If not, those should be included in your checks right now. You've got the wiring diagram (make sure that your wiring is all connected up proper, wire colors & components match the diagram), the service manuals, your dad is an EE... and those tests are fairly simple anyway. Let us know what you learn.