I re-fitted the cleaned and tested orginal switch and still no fookin headlights but in the process I noticed summit I had missed in the dark last time which was one of the red wires had come out form the other side of the 4 connector block and I put it in so I had sides back.
then put the replacement switch out of the 79 in and taped up the connections and hey presto- all the lights are back!!
I also shimmed the door, I repaired, properly with some very clever ally shims I made which can be slid in from one side without taking the hinge back off so now it closes really nice- well for a 38 year old british car with massive doors anyway