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I’m replacing my AC blower motor. The old one had Red,Blue, Black wires for speeds, white Common, and brown & brown/white wires to the capacitor. (Yellow, purple wires for rotation).

The new motor has one rotation direction. It has brown and purple wires going to the capacitor. Black, blue red for speeds. Where is the common wire?

According to the photo I’ve attached, am I supposed to connect a second wire to the capacitor terminal with purple wire, and connect the other end of this second wire to the control board connection where the white wire previously was?

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Yes, your diagram is correct.

Your new motor appears to not be reversible so hopefully it spins in the correct direction.

Colours on equipment wiring generally do not mean anything aside from what is printed on the diagram; there are no consistent standards or requirements.

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  • It is easy to reverse single direction motors by flipping the stator end for end , the only time this won’t work is if there is a centrifugal start run.
    – Ed Beal
    Jul 25, 2020 at 15:14

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