I have a 1/8 hp, single phase, 2 speed blower motor to hook up. 4 wires come off the motor 1 orange, 1 black, 1 red, 1 brown. I do not know how to wire it with the capacitor. There is a orange and a black wire coming from the air unit. The old motor had 2 orange wires and one of them went to the capacitor. The HVAC shop said that this was the right motor for replacement. The wiring diagram is not helping. Any help is appreciated.

The black & red leads are high and low speed, respectively. The brown lead connects to one side of the capacitor, the orange lead to the other side. An additional lead wire must be added to complete the circuit from the "orange" side of the capacitor to the destination of the 2nd orange lead from the old motor.