Hi all, i'm terry, i ride a vespa et50 2004 which has been modded, owned for 5 years and never had a problem, until today. Had a battery drain suspected coming from cheetah immobiliser,disconnected . have a problem with front headlamp, it will only work on full beam, if i switch to dipped, the front light , will go out completely and so does the small bulb inside the headlamp, also instrument lights go out. is this a symptom of a shot headlight bulb or something more troublesome. any help will be gratefully received