I just got finished up with a V-8 S-10 project, I got a 700r4 out of a 91 S-10 Blazer, and I need to know more about the lock-up... It has a wire harness on the drivers side, I dont know exactly what is what... Im sure they are for the lock up converter, and maybe the backup lights? I dont know for sure, any help would be awsome... Thanks!

It's for the torque convertor lockup. Google 700R4 wiring, and you'll find out how it works.