I pulled the fuse box up yesterday to trace the wiring and eventually found the headlight issue.
The break was inside the sheathing close to the headlight where it breaks out of the main wiring loom. If I'd started tracing from the headlight you can guarantee it would have been at the other end near the fuse box. :x
So now I've soldered the dipped beam wiring together and also repaired the white main beam wire that wasn't too far from failing too, the healight now work.
I also tried to solve the headlight raising and lowering problem but I'm stuck with this one. I've checked the motor and the wiring and all seems OK, I checked the relay and I'm getting 75 ohms (should be getting 65) but I'm not sure if this is the problem, I also stripped the motor and cleaned all the contacts. I'm just using the manual adjuster until I can have a think.
With all this work done I decided it was time to take it for an actually drive, which lasted three mile before it stalled and wouldn't start. :frustrated:
After nearly flattening the battery trying to start it, it did eventually start and ran fine again. When I was on a long section of down hill road I dipped the clutch to see if it would idle but the engine cut out again, this time I bump started it on the move, I tried this again and it did the same again, again a bump start got it running again. When I got home I switched off and it wouldn't start on the key, it just constantly turns over.
I'm thinking fuel delivery, DME relay or vacuum problem, a bit more work to be done I think. I did notice one of the vacuum pipes on the J pipe after the air flow meter looked a bit ropey so this could be a problem but I would assume this would still let it start up?
EDIT, just been out and it fired up first time on the key so maybe it had cooled enough to fire up when it broke down earlier, strange problem?