I think I may have fried something in my 2004 Volvo s40, but not sure what. Over the last month, I have been upgrading all the bulbs to LED's and things have been smooth. Today, I wanted to install white LED's for the turn signal on the side mirrors. No problem - but now the Map/Dome lights (Ceiling front - LED's which worked fine) will not turn off no matter what. Even switching it off using the rocker switch does nothing. The rear ceiling lights are fine.

I know its not the door switch because the rear lights switch off when the last door is shut.

For now, I just removed the bulbs.

any suggestions/thoughts would greatly help!

Thanks!

 

Check the interior fuses, all of them. I had a strange backfeed problem with my interior lights with one blown fuse. The fuse wasn't even labelled for the interior lights either. After pulling one fuse after the other I finally ran across the problem. I hope it's not something more complex for you.

 

thank you - ill take a look tomorrow morning and see what I find. everything seems to be working in the car so i wonder what fuse must have blown

 

OK - so this issue resolved itself overnight!