Scooterotica

Out for a spin last night and the headlight and rear light stopped working. Also the main beam wouldn't work.Switched to the side lights and the front and rear were both working fine. The brake light is working as normal. Before I start taking things apart that are irrelevant to this problem is there any chance of a few pointers.
Edit!!!
Just checked the regulator and the yellow wire had come off. Happy days I thought?!!!
What I see now is the connection on the yellow wire is black. Looks like a burn out. Any ideas?

Points ignition?