Thanks for the info .... there were all sorts of oddities over the years (I had a GT6 with a circuit that dimmed/brightened your tailights depending if it was day or night .... all very impressive but soon fell over and got ignored ... the '70s wasn't a happy period for mixing electronics and motor cars in general) Sounds like a period quirk and related to the +8 ..... the switch looks to be made to be on the dash in full view so the 'immobiliser' idea seems unlikely ..... any takers on explaining the ignition cutout function??
K
