I bought these back in September with the CANBUS error cancellers, and have been dealing with a left fog light bulb error since the install. I've contacted their customer support and the only thing they keep saying is to try a different ground point - which I've done. I haven't run the ground straight to the battery. At this point I'm done with pulling the bumper off to mess with these.
Where did you attach the CANBUS grounds?
Anyone have a similar problem?