Which wire would I splice into for the brake switch? Grey, grey/black or brown? I already deleted the ECM and I am going to use the vacuum switch with the brake switch. The two wire setup is a ground for pin D and pin A goes to the brake switch I think. I think this will make it lock up pretty much like it did before the delete, eg. No toggle switch.

 

Won't make any difference.
All you need is power from the switch on one terminal at the trans and a ground on the other terminal
If all you did was take the ECM out then you should still have the factory ( usually purple ) wire from the brake switch to the trans
so all you have to deal with is the other side of the TCC solenoid at the trans

read
https://www.thirdgen.org/forums/carb...c-control.html

 

I think the purple comes from after the ECM. But, I'll check. I am leaving the rest alone, but wasn't sure which wire was the one after the switch rather than before it.

 

As shown in the link

 

Nothing comes FROM the ECM

As shown in the TCC link I posted for you above
12V supply on the purple from the brake switch ; tan / blk control wire TO the ECM to operate the lockup solenoid

 

My purple wire is on the curise control release brake switch. Does that sound right? Should still work I think.

BTW, Thanks for the link.