Voltage when engine not running is 12.6v, didn't want to rev it to 3000rpm at 9pm so will do that tomorrow evening. I can't recall getting a buzzing noise from my hazard light switch, I'll listen again tomorrow. If this is the problem, it's presumably just a case of replacing the switch? Martin, yes a breakfast blat sounds good! I can't make this Sunday morning but I was thinking of popping over to Headcord in the afternoon if the weather's good. Tom