[84hurst]

Not sure if you solved your problem yet or not but I had the same issue on a 94 cutlass 3.1. Relays were fine, fuses were fine, fans worked fine when 12v were put directly to them and also when the coolant temp sensor was unplugged. Never did figure out what exactly was wrong but I just wired the fans into an item that only gets power when the ignition is on. Ie fuel pump or other similar. Now the fans always come on when the key is in the on position. BTW when you say you lost your overdrive after unplugging the torque converter that is normal operation. You're torque converter will no longer "lock" and drop the rpms a couple hundred.