Thanks Doug, yes, I have the wiring diagrams available but am confused by the 2 wires only to the light in the roof.
One live and one earthed via the light switch to the door switch to earth. The query I have relates to putting the light on, via it's own switch when the doors are shut.
Surely it needs a 3rd wire to earth off it's own internal switch. It has 3 spade connecters.
I can't insert another wire and need to use one wire twice but am confused (as usual) how to do this!! ??