My stock fan wires are black/blue which is always "+" and blue/black which doesn't seem to do anything..

My problem is that the car is running too cool... I have a full size radiator, pusher fan on the turbo side of the radiator, and the factory puller fan on the other side. Even sitting at idle the temp won't move any higher than if the car wasn't running at all !!!! If I unplug the fan's relay and let it idle for about 7-10min.s the temp will rise to about "normal", but as soon as I plug the fans back in the temp drops EXtremly fast all the way back to below "C"...

I need to know which wire sends a "+" or "-" when the factory fans are supposed to kick on, that way I can hook it to my relay and the fans will only come on when the engine starts getting a little hot...

 

While I don't doubt that what you are saying is true, I would very cautious using the stock temp gage. It will register "hot" and "cold" but it is not linear. IE, it will remain in one place for a wide range of temps and not move until it sees a large difference. Aftermarket is much better.
HTH
chris