480 Erratic interior light/Electric Aerial !!

My first post and a big hello to you all. I have a 1994 480ES Auto and the interior light and Electric Aerial do not work unless you have the headlights on and you hold the High beam on. As soon as you let go and the Main beam is on the lights go out and the Aerial stops working? Also the Door open light is on all the time and the door switches seem to be working correctly. Any ideas or is this going to be a fault finding nightmare Thanks Marc

If the "interior light/cigarette lighter" fuse is removed, the "door open" warning light on the dash will be on constantly. So maybe you don't have supply at the fuse, you could check the fuse is OK and maybe if you have a meter handy see if you have any voltage at iehter side of the fuse holder with the fuse out. If you have +12 ish volts at the fuse only he headlights on, well something is seriously wired wrong or shorted out leading up to the fuse box :) its a starting point. Pretty much same applies for the aerial.

Hellooo, & welcome to the joys of 480 ownership! Leccy faults are the norm' I'm afraid.