So here's a thing, I didn't know newer cars don't have headlight fuses, they have individual 40A breakers for left and right. I have auto-on lights and when they kicked on one blew and it tripped both breakers :( There may be another way to reset it but the simple solution we came up with was to disconnect the battery for a few minutes and rebooting the system. Then it worked with just one bulb until I put the second one in so that's nice to know.