Well after spending yesterday working on it, here's what all I found:
1) I had to rebuild a harness for the front lights, splicing my original firewall connector to a 84 CJ7 harness (thanks to previous owner) and incorrectly wired the left and right turn signal. Both wires at the plug were green instead of green and green with tracer.
2) A cold factory splice for the passenger side turn signal wire
3) Poor grounds everywhere!
After doing all this, my brake lights literally worked fine for about 5 minutes and then suddenly stopped. Turn signals, parking lights and headlights work fine. I ran out of daylight but I'll try to run down the brake circuit tomorrow or Monday and get back to you.
1973 VW Karmann-Ghia first car
2009 Challenger R/T 6MT, Flowmaster, inTune daily driver
1977 CJ5 304, 3MT - under construction
And many in between!