I haven't put power to my car yet, so I need a sanity check here I have an electric fan. (flex-a-lite 210). dual fan. I have a terminal block on my car - the horn relay. Has a stud on it which is a junction block for power. A bunch of heavy guage wires run off to other items to put power to them. I assume this is hot at all times (essentially battery power). I have the provided fan controller. There's 2 ways to activate this: 1 prong gets battery power (my plan is from the horn relay) & The trigger can either be 12V switched - or battery power. Here's my question. If I come off the 12V switched source, I would probably want to run a relay? OR - per the instructions... if I run another wire from the horn relay and have the trigger hot all the time, I don't need a relay. The Tstat control will break the circuit and leave the fan off - unless the car is hot or I activate the fan via an auxilliary switch. Apparently method 1 (which would require a relay, but the fan instructions don't mention it) - only allows the fan to run if/when the key is ON. Method 2 - the way I'm leaning is to have the fan hot all the time. This way I can turn the fan on and cool the car when the things shut off. So summary - I don't need the fan relay if I go with method 2?