The headlight works with the engine not running. I can tell that there has been some "tampering" with the wiring so I may have to get a schematic and trace everything. There is an extra wire not on the harness that is stuck in the headlight socket and runs to the rear of the bike near the tail light. I don't think that is right. The battery is new and fully charged. Do you know what helps to keep the battery charged when the bike is running? I also suspected the turn signal flashing unit. I will have to look for one. Thank you for the advice on the horn. I will check all connections. Thank you again for your response.