Light games…or: why wander to the distance!??

Moin moin together! My 9000CD Bj.88 has the following woe: After light travel (abbreviation light) this is temporarily after turning off the engine – even when turning the light switch in zero position – not extinguished. After once to x-time pressing the main light switch beyond the tip point (click) it is extinguished and then for the next time fulfilled its service without mucking again a few days… In addition, it could not be switched on at times, which was expressed so that I could flash up, but when the switch was released it was again called for short-sightedness. When the next floor wave was over, it was unexpectedly there again and more than once the picture left a light hopping enthusiastic pusher behind the front man. So and for a couple of days there is an end to the main light/light horn which also occasionally sample -Acting the main-beam switch or even eagerly run over from ground waves no longer change… My guess would be a wobble contact / cable break… but who knows where I first have to look at this model? Am still layman and liked to look as minimally invasive and purposeful as possible… Thank you in advance!