Moin, I got a scooter (TPH, Piaggio) a week ago, which has been standing under an outdoor canopy for two to three years. The engine can be easily started via the kickstarter. However, the complete electronics (except for the brake light) is without function (hupe, e-starter, turn signal, dipped light/Fernlight/Standlight, speedometer lighting, tank/oil indicator). After I have disconnected the battery and increased the engine speed, the tank/oil and speedometer indicator lit up. The voltage regulator is also new. At this point, the voltage is also due to the output terminals. A pass test with the multimter on all cables did not result in a cable break. All switches and contacts were disassembled by me, cleaned and processed with contact spray. Also, a contact spray was used for the control of the battery. ll light bulbs have been tested for function. Do I perhaps think too complicated and the solution is quite simple ?