Greetings all. Brake lights on the sides are not coming on, but the center brake light under the window still comes on. I have checked both bulbs and run current to them and all of the filaments light up..I cleaned off the little brass nubs on the bulb housing. Checked the fuse and it was good. Any ideas? Internal hatchback door wiring coming loose? Left side was working earlier today. I'm not too knowledgable about working on these cars, but can take apart an old VW bug from stem to stern without too much trouble! Any insight regarding this issue appreciated.