Hey group
new hear , seen lots of info but still not getting specifics to my needs
Is anybody familiar with wiring tcc from a 94 camaro lt1 transmissuon harness to a 700 r4,
I have made all connections in my s10 blazer swap
- blue/black switched 12 volts from brake
- tan/black is wired ground side of an indicator light and at the aldl port
what I need is what wires from the 94 harness goes to the 3 wires on the 700 r4 and or if I need to add anything with it
One of my biggest confusion is how does the pcm know when to send ground to that tan & black wire
700 r4 plug is A B C D , C I believe is empty

Just need someone's help to make it more clear as to proper wiring
Thanks in advance everyone