Driver side Break light not working

I have a 2006 tacoma and only the Driver side break light isnt working. Changed the bulb and tested the bulb on the other break light to make sure it was working and it is. I checked the small 10amp fuse under the hood and under the dash, both are good. I would think that if the break switch was out, neither break light would work?
Also, my third break light up on the cab, has one bulb not working. The other two inside are. Would this be causing my driver side break light not to work? When I turn on my turn signals they blink really fast like a bulb is out, and the only one that is in fact out is one of three tiny bulbs located on the break light Cab. I will add that my plug in for my plug for my trailer lights was ripped off when doing stupid stuff. Could that be causing this also? I have a new harness and plug on the way, just wanting to get this figured out. Thank you !!!

 

Does your tail lights work on the driver side? If not, likely is a bad ground. The center stop lamp has no affect on the brake lights other than sharing a common fuse for power.

 

This /\ /\ /\ is my bet. Are you installing the new harness?

If it were me, I would start by cleaning up the mess first. Cut out anything damaged while looking at the rest of the OE harness in this area. If the trailer harness was ripped out, you may find more damage where the cable is secured to the frame on either side of the damaged area. Also check where the cable makes any 90 deg bends while leaving the damaged area. You may find your brake light issue during the clean-up process.