6L80 TCC lock up... CLINBARGER HELP!!!!!

[Hart_Rod]

Well I thought I had the TCC brake switch lockup wiring figured out on my 2013 Camaro GEN IV 6L80, but no I'm not so sure.

I know the torque converter is locking and unlocking based on paramaters within the tune (MPH) as I have been data logging and and you can see the pressure increase (lock) or go to back 0 (unlock). However, if I hit the brake when I know the TCC is locked (pressure greater than 0), it does not cause the converter to unlock (pressure drop to 0). Am I missing something here? Here'a diagram of how I have the TCC wired up (keep in mind Gen IV's are opposite of Gen III's).

HELP!!!

EDIT: When the brakes are not applied, I measure 8vdc on the TCC wire. When the brakes are applied the voltage goes to 12vdc.