So i've had a set of these installed for a while. Working perfectly.

Today I noticed that they're both out.

Checked he fuses, and fuses are ok.

Was even working earlier in the afternoon.

Aside from the 2 fuses, what else could cause both sides to not turn on at all?

The dash also indicates that they're on, but they're really not :

 

Put one of the old bulbs in to see if it's the bulbs or the car