Disco heater/blower unit

Hi. I have a heater/blower unit from a 93 disco and wondered if anyone knows how I can test it. It's currently out of the motor (that I now no longer have). There is 3 wires in a plug and I was hoping I could just connect them to a power supply to test the motor. So far I've tried all variations and nothing works. Any have any ideas?
Thanks

Can you flick the fan round with something to check the armature bearings aren't fubar?

Usually seized solid from that era, replaced my motor last year the old one was beyond saving,

Only two wires direct to the blower motor, black = ground, white/grey = 12v live so connect to a battery and it should spin, it doesn’t bin it and get another as the stator could be seized as already mentioned
And fit an air blending unit from a 300 series