Have you tested it first with a multimeter? Need to check for continuity across the connections when pressing in the button
It's underneath the brake lever assembly. A short screw driver is all you need. Have a look and see for yourself. It ain't hard
Located it. But I can't get enough purchase on it. Slightly worried about stripping the phillips screw. I think it must be "glued " in. I will try again today. If no success, then Mr Honda.