TCC not locking up

[TWISTER]

I posted in the tech section with not much success but my torque convertor is not locking up manually or with the chip. How can I trouble shoot this problem? Im racing on friday and need a fix quick. The tcc was replaced by Vince Janis at the rebuild a couple years ago also.

 

[TWISTER]

I was able to find an old thread and I do not have 12v at the purple wire so I assume I need to look at the brake switch? I do have a 12v signal key on for the 3rd and 4th gear thou. Ill check the brake switch next I guess.

 

[TWISTER]

Fixed... The upper brake switch was not fulled engaged from the vacuum convertion. Lesson learned.