I am trying to wire an old Emerson Electic whole house fan motor for 120v. The part number is KS73CXS1-139. The wiring compartment has 5 wires, 4 black and 1 gray. the wires have no markings. The terminals are labeled T1,2,3, and T4. There was no connection to T1, one black wire to 2, two black wires to 3, and one black and one gray to T4. I think this motor was wired for 240v, but the wiring was very scary. it appears that is was hooked up to two 120v circuits.