Trying to install some aftermarket fog lights to a switch so that they only come on when the parking lights are on. Can anyone help me with distinguishing what prong on the relay is for what? The lights came with just a regular 30amp automotive relay and a toggle switch with 3 prongs; one for power, ground and accessory. Any help greatly appreciated.

 

see the FAQ I posted at the top of the board. there's a link inside there that explains relays in very high detail.