hooking up a new 2 wire fan ,need help in finding the wire that get power when the thermostatic temp switch closes ,my new fan has only 2 wire does anyone know in black goes to frame ground and red goes to what color wire in the factory connector

 

did you look at the wiring diagrams?

Also, it may not be the best idea to directly power it directly through one of the stock fan connector plugs. This new fan could be pulling a lot more current.

 

fans only pull total of 12 amps and total of 3200 cfm.