I am hooking up a relay for my additional fans...and I have a 3 prong relay. I've hooked it up, but don't know if I've done it right.

There were no directions.

I ran a direct positive to the ran.

Then with a 3 way switch, I ran a constant ground to the switch. I made the middle prong go to the first prong on the relay which has continuity with a ground source. Then I hooked up the last prong (the top one) on the switch to the middle prong on the relay.

It works...I don't know if it's right. I'll post pictures if it will help.