Window and seat motors can be checked on the bench with a power supplied from a battery pack, battery charger or jumper wires from a 6V or 12V battery which ever is applicable.
Both motors have the same color coded wires. black, green, yellow and red.
When connecting the the green and black ground wire a slight arc may occur. If a heavy arc occurs the motor may have an internal short.
A word of caution: Do not leave positive power connected to the green wire for an extended time. The motor will over heat.
Be sure to secure motor from movement before testing.
Gil Baumgartner