umm... what?

can you explain your setup a little more thoroughly? what kinda switches are you using? where are those extra 3 wires from? how are you wiring your window switches (3 switch vs 2 switch). can't help you without more info. window motors are very simple. one wire gets power, the other gets ground and the motor moves. reverse the polarity the and motor changes direction. not much to it besides that.

*edit*
ok read your other thread and now i'm more confused. please clarify your setup.

i hope you're not tapping spal motors directly into stock switches. i believe the stock system is a (+) trigger system. spal motors are made for a rest at ground system. (or i suppose you could use a rest at +12v but that's probably not a good idea for obvious reasons).

-marc