how to test 70 headlight motor?

[spoolinhard]

I have a 70 headlight motor that I have been trying to test. I have been hooking it up to a battery and it does nothing. There is a two wire pigtail that I have been hooking it up to attempt to test it, there is also a prong that has a two wire (what looks to be) ground on it. No combination of the four wires connected to the positive/negative terminals of a battery will get it to budge.  Testing it on a car is not an option. The knob turns freely on the end and spins the headlight rod. Have I been hooking it up wrong to test it?

[70 sublime]

Ground the negative to the motor case and positive to one wire or the other wire ( forward and reverse)

Try turning the knob at the same time to see if it will try to turn

[b5blue]

Running it without being installed can crack the gear. Ground the motor and each prong of the plug is up or down.

[spoolinhard]

Looks like I was way off. Thanks