Strange problem on my 2002 wr426, found neither head or tail lamp were working on dipped or main beam, checked brake lamp and that works fine but only when other lights are switched off. Brake lamp doesn't work when dipped or main beam selected. I've tried disconnecting head lamp plus tail lamp in turn, checking for earthing of live wires and also the switch, but found nothing wrong. Anyone out there with any clues or just got to resort to miners lamp?!