E30 Zone

Bonnet up for charging (as I'm not using it regularly), no key and I'm sitting inside with the door open, courtesy lamp on.

I notice the windows do not work - normally they work without a key if the door is open.
I close the door and the courtesy goes out but stays red. As in red-hot, a tiny bit on.
If I press the window switches now it brightens up,
If I pop out the window cutout on the dash it goes out, reset it comes back on to red.

Has anyone else has this?
Any ideas what to check?

Dodgy door pins?

Door pin switch isn't earthing properly to the body?

When I open any door (2 door 1986 convertible) the courtesy lamp comes on nice and bright .

The courtesy lamp just never goes off properly - it is always red hot unless I pop the window cutout on the dash or switch it off on the lamp.

Solved:

Fuse 28

Obviously it does rather more than it claims in the manual...