I need help with under the dash wiring brake switch and such

Ok so got brake light switch hooked up but what puzzles me is only passenger side works but wire harness goes to drivers side first then passenger so idk

What wire harness are you talking about? I told you above.........the brake switch gets constant power. When the pedal is pressed, it connects brake lamp power INTO the TS switch. The switch must be in neutral / center. The switch then routes brake lamp power to the left kickpanel connector, then back to the rear to the lamps

Could be bad TS switch, bad connection in the kick panel connector, broken wire in the harness, bad ground at a rear lamp socket, bad pigtail, bad bulb..........................Use your head

Did you read anything I posted?