I forgot to mention that the other wire coming off the switch is the wire you use to tap into both gray and green blinker wires.
Here's a wire diagram:
The basic circuit is that the orange wire from the relay is constantly at +12v while the key is in the On position in the ignition. When you close the circuit, in this case switching the switch to "On," it closes the circuit and sends voltage to lights. In the stock switch, it depends on whichever circuit you're closing to activate the blinkers. In this situation, we're closing the circuit and providing power to both sets of lights.
I should also mention that even though it does work with the stock relay, it didn't sound very good. It sounded like the relay was struggling. If you want to upgrade the relay, purchase the ep34 and put a ground wire on the E pin. This may very well work on the pregen models as well, but someone would have to verify with a factory manual.