Ignition Map Harness This is a wiring harness that connects the factory headlight switch on XCW's to the ignition map connectors. You can switch between the performance and soft maps without adding more clutter to your handlebars. With the OEM light switch in the off (down) position you will be running the soft ignition curve. Pull the light switch to the on position (up) the bike will be running the performance ignition curve.