I have the YY50QT scooter. I have the problem that the complete lighting does not work, low beam, parking light, rear light and the right brake light switch do not work. The turn signals and brake light switch on the left work perfectly. I have no power supply at the connector to the light switch and therefore no power supply at the lights. The generator charges at about 14V at high speed. The battery is 1 year old and discharged. The ground lines on all lamps are OK. Maybe someone has the solution to my problem?