Relay/Switch for fan

Ok, I have a 4 prong relay and I'm trying to wire it to a switch to power a fan. The switch has 3 prongs, Power, ground, accessory. I was thinking about using the switch inline with the 12v+ for the relay itself(to toggle the power on and off). But I do not know how to do that on the switch. Please help me. Also, I'm completely bypassing all of the OEM wiring, and I'm running a power wire off the alternator with a 30amp inline fuse, which will be going to the relay.

all you need is a little switch./ hook up like this relay pin 85 negative input from switch pin 87 and pin 86 12 volts constant fused from battery ok pin 30 output to fan pin 87a not used. you probably need to get a better relay than that 4 pole as it maybe missing a pole needed in setup i have described. ground second wire from switch this setup will not work on a switch with a build in light it will only work with a two pole not light switch. if you go to jegs.com they sell a fan controller that turns on fans via temperature which you set via a knob. that with a 12 volt relay will control your fans automatically at a set temp of your choice. copy and paste link to know what i am talking about http://www.jegs.com/webapp/wcs/stores/servlet/CategoryDisplay?lang=-1&catalogId=10002&storeId=10001&categoryId=21529Jon

Installer/Help Technician

---coral springs florida---

mecp certification is not always needed. I have it and it has not helped me out at all. my experience out shines it.