3 post illuminated rocker

I'm Back. After figuring out the correct combination with your help, I ran all the wires in the boat and attempted to reconnect the circuits and am having the same issues. The challenge I have made for myself is the wires are now covered in protective armour covering, and although I labeled the wires at the connection end, I have something wrong and have blown 2 60 amp fuses. When I first connected power this last time a few minutes ago, the LED light in the rocker switch was on all the time. So going on what you said, I applied ground to the 3rd post, and reversed the 2 other wires. One question I have, is the 3rd post the one with the ground symbol? If I apply ground to the correct place on the switch, would there be anyway that reversing the other 2 would cause a short and blow the fuse? Thanks for your help. Frustrated, but almost there...

The LED is connected to the ground terminal and also to the ACC terminal.  The plus terminal is supposed to be fed power.  When the switch is switched on, the power is now connected to the ACC terminal, thus lighting the LED.  If you apply power to the ACC terminal, the LED is always getting power, switching the switch to on, the device at the other end will switch on, but the light will not switch on and off because it always has power.

Ok, that makes sense thank you. I have the ground connected to the ground terminal, leaving me 2 wires in the middle. One to power and one to ACC. I thought seeing as the light is always on, reversing the 2 other wires besides the ground would fix that issue. But instead it blew my fuse. I am also running a basic voltage meter. It has a pos and a neg and a common. I hooked the pos to pos, neg to neg, then ran power to C terminal and it worked well. I am wondering if I have both power lines running to the switch instead of just one. I do have a volt meter. I could check to see if both lines other than the ground are hot. If thats the case then I need to pull one off and connect it to the meter vs the switch. Learning as I go... Thanks for any input.

You had to have moved the wrong wires.  The only way it will blow a fuse is if you have power to plus and ground attached to ACC.  Or Vice Versa.