That depends which relay is fitted and what year it seems.
Is it the pink one ??
If so my headlights wouldn't work without it. Not wanting the relay and not wanting to pay the price I made up a link wire across two of the sockets.
Sorry
1 I can't remember which two sockets
2 I can't find the lump of paper with the details written on it.
Go to
www.lrtech.co.uk. Defender board. There's a couple of posts of mine in there that might help you.
Have a look at "Light stalk fault" on here as well.