Carling switches

I found a carling switch in my desk, so I started playing with it... it's one of the Contura switches (often used with ARB lockers)

it has 3 prongs with no labels, so I'm a little confused. one is at one corner of the switch, and the other 2 prongs are at the opposite corner. I assume that the single prong is for the "in" power, and the other two are for ground/"out" power. what's confusing me is that one of the two is always hot if I give current to the "in" prong even if the switch is in the Off position.

Are the lights on the Carling switches always lit? I'm not giving it enough juice to illuminate the light, just enough to let the multimeter do its thing.

actually... I think I just incorrectly assumed which one was the "in" prong. makes more sense that the "dead" prong is actually the "in", and that the other two would be linked. the location of the prongs is what threw me.

If you have a meter why don't you just check the continuity between pins with the switch on and off. That should answer any questions you have.

There are a ton of different options with those switches. I've seen them with 9 or more pins! The easiest way to know would be to check it with a meter.
Billy