Brake light issue need help fast

Do you have power to the white wire going INTO the switch with the brake pedal pushed? Check the switch connector first to make sure everything is good there.

THIS

Access the TS switch connector coming out of the column. Check the brake light switch power feeding INTO the column, on both sides of that connector I believe it's white

Also the hazard switch in the column. This is a high failure deal, and could be the cause. Way WAY back in the early 70's before Al Gore invented the internet, I temporarily fixed three Mopars for friends by making a simple change to the wiring at the switch. This is right at the TS switch so you have to pull the wheel. I forget..........been that many years........disable the hazard switch (cut it off) and probably move the brake switch wire to another terminal