Stephen, that sounds like a good answer, because I have seen no indication of burning or discolouration, because it would probably light up like a bulb. now I just have to work out making a light bulb power supply and find the right fuses 30mm x 5 mm seem not to be as common, probably could fit 25mm x 5mm alright. did find the complete service manual online only in Norwegian I don't think they ever made an English version, maybe someone here knows?
in the meantime I will Google the text and cut and paste the diagrams 44 pages should keep me quiet. apparently there is no easy way of taking a PDF and translating it automatically, first to word for text.
Clive