Hello, Black is common, red, yellow and blue are Hi, Med and low speeds.
Hook it up that way, then try it with a clamp around amp meter on the common (black) and if the motor draws its rated full load amps and comes up to speed OK, then you have it wired correctly.
There should also be sticker on the side of the motor that shows black is common,, those can be a bit cryptic at times but if you spend a few minutes it will make sense to you.
You can buy a clamp around type amp meter at Home Depot for about $50 or at Harbor Freight for about $25.
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