Hello,
you can find some wiring diagrams here:
http://www.club80-90.co.uk/pages/downlo ... eneral.pdf" onclick="window.open(this.href);return false;
I think the lighting circuits I found in those are for US vans, which I think is different (might be wrong about that). I can scan pages from Haynes for you tomorrow if it'll help -
Starting with you brake lights you have a short somewhere clearly - this wiring starts at the master cylinder - I'd start there, and work your way back. I've seen the loom in the dash damaged before, resulting in shorts.
It's possible the short is in the engine bay too - there's a white circular connector in the little black box which you can undo - as far as I remember the lights get fed through here too - you might have a problem in there.
What do the connections at the rear lights look like? You might conceivably have a problem there - it daisy chains from one to the next.
As far as the feed to the side lights go, it's a case of tracing that back too, but it sounds like you just need to trace wires back and try and find a bad connection.
As always - it's a good idea to clean up all your earths while you're there.
Good luck finding your faults
Ewen
