Join Date: Nov 2018
Location: Gloucester, VA. & Manassas VA.
I would say yes to the wiring diagram so you can tell what wires are going to the dimmer switch. You can than also check the operation of the dimmer switch with a meter with the connector for the left handle bar disconnected. You will know what wire is the power supply from the fuse to the handle bar connection and if it has power on it with the fuse installed and no power with the headlight fuse removed. An owners manual,service manual and wiring diagrams are a great help when looking for problems on any motorcycle. Before you start ripping wire harness apart you need to use the factory disconnect points and fine out where the wires are not intact.