Defender Interior Light problem

[Reads90]

Ok have a problem with my interior light in my 110.
Here is what happens and what i have done.
Interior light works with the on switch but does not work in the switch posiition for working when the doors are open.
Replaced the door pluger switches, Nothing . And checked cable which shows that there is power going to the door switches. And also check the switches are earthing which they are. Also tried to earth the switch from another area, still not working . .
Took the light out and checked the cable and connections in the light and all is ok. And checked the interior light switch fuse which is fine . Still not working

Can anyone shed some light on what may be the problem
Cheers
Ali

[vnx205]

I had some sort of problem with mine.

It turned out to be a faulty earth at the light itself, not the switch.