I have a number plate light fault that shows up on my dash, 2015 458 spider. Both lights are working! Possibly a resistance issue? I was going to change both bulbs, but they are a PITA to get to. Could there be another solution? I do know that changing the bulbs is a good first step/ troubleshooting step... It is just that I have to remove the air filter housing to get there ... and i am lazy.