Hi!
I realized today that one bulb of the tail light was dead.  While opening the case, I noticed it was broken, then I broke the other one trying to remove it to see the kind of bulb I needed to replace it. So with two broken bulb, I'm trying to remove the remains.  Are they screwed there  or just snapped ?  They don't seem to come easy.  Should I pull with long nose pliers or should I try to unscrew them ?  Any tips would be appreciated.  Thanks
                               Benoit V.

It's ordinary "bayonet"-fittings. Take the long nosed pliers, push & turn, the pull. Try some WD40 first and some wiggeling!