[CustomCab66]

In order for the lock up torque converter to function properly a constant 12 volt source needs to be wired to pin 33 on the PCM. The switch in the image is a corvette brake light switch which has normally open and normally closed contacts. I did change it up instead of using the jumper I ran an ignition hot ( pink wire) to the normally closed side of the switch while the button was depressed (foot off the brake peddle state).