If its the pushbutton style like in the pics, engage the switch and with a + and - test wire, try combos until you get the on indicator to light. then you know youve got the 12+ and ground. then the remaining one is the Acc.
I think in general it goes from top to bottom:

A: 12+
B: To Acc.
C: Vehicleground

Let us know what you find!

 

Thanks Ghostrider, I was beginning to think my post got lost at the end of that old thread. I'll give that a try. I ended up getting frustrated and plugged the damn Piaa switch back in. From what I was seeing with the multi-meter, it should have been in the circuit correctly. Sometimes you just have to walk away for a little whilewhen frustration sets in and come back to the problem with a clear head. Also, It never hurts to ask for help. LOL
Thanks,Greg

 

Make sure you use a relay. Don't run full power through the switches

 

does anyone have picturesof an aux plug for a MP3 player or DVD player?

 

The holes are round. Your switch is oval. How did you make that work?
Those are simple on-off switches right? I wish I could find a hi-low-off switch that size for my seat heaters.