My tailights/running lights are not working. I've swaped bulbs, changed the fuse, cleaned the ground and terminals. What else's is there? The rear sidelights do not work either, the front ones do. All the other rear lights work.
Any ideas.

 

check your front turn signal bulbs and make sure they are double filament. I had this problem and it turned out it was a wrong bulb. Other than that, grab an electrical diagram and see what is connected to the rear taillights and start checking.