Originally Posted by redneckbrat
Since you didn't mention it, did you check your fuses?
I agree, start at the source. Check the TAIL fuse and the BRAKE fuse with a multimeter/test light to make sure there is power there at least. Take the test test light and trace it out. Its tedious but not hard.
Check the bulbs as well. The simple stuff first.
A FSM with wiring diagrams and color codes is a huge help and worth every penny.