Hoping someone can shed some light on this. The electric fan in my car quit. I hooked it directly to the battery, to test and it works fine. Checking I find the fuse burnt and the fuse holder melted. Loose connections at the relay, so think that was the problem and will replace fuse holder. There is also a relay, and a adjustable temp controller. All this has worked since before I owned the car, ten years at least. Here's what has me confused. The hot goes to fuse, and then to 86 on relay. There is a jumper from 86 to 30. The two wires from the fan run directly to 85 and 87 on the relay. The adjustable temp controller, has two wires connected to it both go to separate grounds, and of course the sensor in the rad. I don't understand how this works at all, where's the fan ground, why are both wires from fan going to relay? I looked on line and find wiring diagrams and none of them look like that. Can someone shed some light on this, or have I got screwy wiring that somehow has worked for years? Thanks for any help.