I need a wiring diagram for a aftermarket relay

Hi, I'm going to be wiring up a relay for an electric fan and using a aftermarket relay. I didn't get a wiring diagram with it.
On the bottom of the the relay the terminals are marked
85 86 87 87-a 30

Please keep in mind that I have air and want the fans to kick on with the
a/c compressor
That's 85 on the far right

OK, I used RangerJoes diagram to figure out how the relay works. I hooked up a relay on the workbench and I was using a test light just sort of playing with it and I couldn't figure out how to get the fans to kick on if I only used one standard relay. Mustang5L5, I forgot to mention that I'm using a one wire sensor that grounds when it reaches the temperature I want the fans to come on at. Your idea would work if I was using a two wire sensor. But thanks for kicking some info into help.
I kept searching until I found this on the net. I thought I would post it in case someone else is going to wire in a fan and they have air conditioning. From what I have read the reason the factory fans come on with the air is because the fan must come on to cool the A/C condenser when ever the air is on even if the engine is cool.
I guess I'm guilty of asking before taking the time to look for what I was wanting to know. hope this helps someone.