Ola,
Having taken the gauges(Right hand Drive 110 units) out of the series 3 i have discovered a lot of really attractive burnt cables where a later loom has been grafted in.
This will al be corrected however on the back of the speedo(right hand side as you look from the top)there was a little metal thing.After reading the post about the dash stopping working i think this could be the voltage regulator.I didnt think they had them on diesels or have i got my wires crossed :lol:
Thanks
Lampyrover
PS its a perkins Diesel.