Having trouble with aftermarket fan connection!!! help

[EvilAWD]

i have a 93 gsx. i was doing the whole turbo swap and needed some smaller fans so i bought them at an auto parts store. i connected the a/c fan pretty easily and it works whenever a/c is turned on. the other fan wont turn but it will whenever i turn on the a/c. im not sure what i did wrong. basically both fans turn on whenever i turn on the a/c. the other fan has 4 wires total and out of those 4, theres a blue and black wire so i connected that to the fan while the other two left behind had a plug that would connect to the bottom of the radiator. did i connect it right? im not sure why it doesnt turn on. it didnt overheat but it seemed like forever before the fan would turn on and i was working all day on the car and finally got frustrated. i just want to make sure i connected it right and its just me whos a little panicy.
btw, the fans worked perfectly before i ever took them out of the car and i didnt shorten anything because battery wasnt connected.

 

[BISHILVR]

If you had the radiator out make sure that you dont have any air left in the system. Also you might have just a bad thermo switch for the fan.