Checking it would require removal and testing of the leads via continuity check or ohm to verify that they are doing what they are supposed to. I wish I could eloborate, but mine is a manual and I've never seen the switch in person, so can't tell you which leads should do what.
I think your best route (if you aren't familiar with electrical testing) would be to contact Woody and see if he has a used working one. His prices can't be beat and shipping is always fast.
His username here is itsnotanova.
His profile -
http://986forum.com/forums/members/itsnotanova.html
It's best to call or text him, though... 512-925-9171