I replaced all my bulbs and now all lights work except left turning signal. What

IF brake lights are working - then the bulb and circuit are ok - it’s the same exact circuit ! The other circuit is for PARKING LIGHT element in that same bulb. IF BOTH the front and rear signal light bulbs are illuminating but not flashing - replace failing signal FLASHER. ASSUMING you installed original equipment type bulbs - no so called up-grades (?)