Re: Testing shift interrupt switch
Checking the shift interrupt switch has nothing to do with shifting. It can be done in the water out of the water, or even take the switch out of the boat.
Disconnect both wires put an ohm meter between the 2 leads of the switch. With the swich released, no continuity.
Push the switch down till you hear it click, should have continuity with little resistance.
Now, the question is, what are you actully trying to figure out. Tell us what your problem actually is, not how to test something that may not be your problem.