Brake light issue need help fast

^^^ Yes....confusing...first there is power and now there is not.

The power will be on it (the wihte wire) with the brake pedal depressed; it goes to the white wire when the brake light switch is triggered. I suggest you re-check power on the white wire to be sure so we can all be on the same page. If there is no power on the white wire when the brake pedal is depressed, then your brake light switch is not working.

At the brake light switch, there shuold be power to the pink wire all the time and out of the whtie wite when the switch is activated by depressing the brake pedal. If no power at the pink wire, then it comes from a fuse in the fuse panel, and drops power to the emergency flasher on its way to the brake light switch.