Emergency stop switch

[tsubaki]

You should be in a position to test them and see.
With the wire unplugged from the power pack test (with an ohm meter) to ground and see if you have good resistance (with the key in the on/run position), pull out on the kill switch to see if the resistance changes from zero to infinity. If so, it's the removable part of the kill switch that's the culprit. If not, it should be the ignition switch or something causing the closed circuit like a pinched wire.

In case I'm not making it plain. Zero resistance is a closed circuit position, open would read real high to infinity.
With the key switch off, you should get a closed circuit or zero.
With the key in the on/run position (if the kill switch is operating properly) you should get an open or infinity reading. If not pull out on the kill switch to see if it's the removable devise causing the problem.

Now if you still get a closed reading with the ignition switch on and the kill switch pulled out, it can be either of these causing the problem.