1990 700R4 transmission plug question

on the driver side of my 700r4 from a 1990 chevy truck there is a 4 prong square GM weatherpack plug. it has 3 pins inside of it. can someone tell me what the 3 wires do? thanks!

Torque converter lockup

how can i wire it up in a differnt car. it is going in a carburetor driven old car.

nevermind i found it online, THANKS