Windshield Washer Motor

[mightyatom]

My trucks windshield washer has never worked. I assumed it was the washer pump motor so picked up a replacement from the scrapyard but still nothing. Is there any way I can pull the washer pump motor from the windshield wiper motor and hook it up to power/ground and bucket of water to check it is working ?

Also as they have never worked I am assuming that the washer is activated by pushing in and holding the wiper motor switch on the instrument cluster. Is this correct ?

Thanks