My interior and boot light have stopped working after putting a LED into my interior light. Took it out and put the old one back in but it's still not working. I've had halfords to look at it and they've said its not a fuse. Has anybody got any idea what it could be as it's annoying and worrying me.

Thanks

there is a fuse its in the interior fuse box
look in owners manual for location as i cant remember