HELP Tail light Issues!

[Apex381]

I was wiring in my new turn signals after converting to small bumpers and the front left parking light was getting no power, along with the front left side marker. So me and my friend were looking over the fusebox and now the rear tailights/dont work! I do have use of the turn signals and the third brakelight works but thats it.
I've checked fuses 23,22, and 6 and they are getting power. We know its not the brake light switch as well because the third brake light is working.

What the hell is going on??

[Apex381]

I read in another thread that there is a module in the left side of the trunk that controls the tails. That must be in late model cars because mine does not have it. Anybody got any bright ideas?

[StereoInstaller1]

I read in another thread that there is a module in the left side of the trunk that controls the tails. That must be in late model cars because mine does not have it. Anybody got any bright ideas?

My '87 325is does...maybe it is a swartz thing?