How to Bench Test Wiper Motor?

Troub said
It’s an early 67 I think as it has the white plastic switch. Guessing a two speed but I know some folks call two speed a “variable” speed, don’t think it’s a three speed.

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Yes. That is the info you need.
It is not like the others and I can not vouch for it being used with the variable switch. I beleive it is a 2 speed by Neville Leece, and I *think* the wiring functions the same as the other two speed used in '67

The date code is probably the 4 digits after the stamped part number.

so 3326 is 332 day of 1966.
https://www.forabodiesonly.com/mopar/threads/wiper-motor-wires.425520/page-3