Are you sure that the bulbs were blown?
I'm pretty sure they were blown. I'm about blind as a bat even with my reading glasses on when trying to see things as tiny as those tail light filaments but I'm confident that I saw that they were burnt out after looking very closely in good lighting. The new bulbs came right on when installed. As I said in an earlier post, I must have done something to cause them to blow while messing with the wiring and disconnecting/connecting the battery.
Marlan