How to test a 200t Killswitch

Made this for a friend, hope it helps out with trouble shooting a 200t killswitch when it doesn't turn the saw off. Same procedure for any chainsaw really, components are in different locations but testing procedure is the same. Should work for the 201, 19X, 15X, series Stihl top handles. The 15X series the flywheel and clutch have to be removed (in that order, trust me) and the oil cover to access the wire that bolts to the cylinder.