Interior lights

Not had my Disco for long and trying to sort out some inherited problems.
None of my interior lights are working off the door switches, although they all work manually on the units, so the power supply is ok.
I found a broken connection at the passenger door switch and replaced the spade connector after faffing about looking for the cable inside the A pillar.
Still no success and also noticed that there is no warning buzzer for lights on with door open.
Is it a knackered relay??? if so where - as the handbook doesn't detail it or it's location.

I assume it a D1 if so the multifunction unit MFU look after the interior lights, key-in lights-on beeper and few other things like wiper delays and rear fog lamps, check them out, you won't be able to repair an MFU if faulty.

Cheers Discool,
Sorry, yes it's a D1 (300 TDI) and funnily enough the fog lights,rear wiper and delay wipe don't work either!
Brilliant thanks, off to ebay then:clap2:

This is what an MFU looks like it's pluged into the rear of the internal fuseboard, I had to replace mine 15months ago. There two types easy id'd by the colour black or beige.