I have managed to get wiring from a central locking kit to the drivers side door through the rubber tubes - I found detaching the fuse box let me access from the car side and a bit of bicycle gear cable got down into the door (eventually!)
On the passenger side however, the heater blower unit is preventing me from accessing any of the wiring on the car side. I figure if I can remove it I have a decent shot at getting the wiring out from the car, and according to the enthusiasts manual (grainger and shoemark) I should be able to pull this unit after removing the glovebox and three bolts. btw this car has A.C and this seems to be part of the problem.
I can not seem to get it out though, and am starting to wonder if the dash needs to come off..? Any tips appreciated - either how to access the wiring some other way, or get the blower unit out (preferably without removing the dash!)