i have a little switch that i wanna wire up to turn on and off my accssory wire to my amp.
it has 3 plugs ground power and acc. what do i want to hook up to what?

 

just run the remote wire to the power and then from the acc(i think) to the amp i did it in my car and works great i recommend everyone doing it...

BTW im not sure if its the acc or not but if its not it doesnt hurt to unhook it and try a different one... just turn the HU off before you do it

 

The switch you have is labelled to supply power to something and the switch will lit when power is on ...

So the ground and power is for the internal bulb and the power plug will be switched over acc plug.

If you want to use it as a signal switch like cutting power on your remote wire asylum24 is right!