Pics are attached. First I know very little about truck electrical systems. So, I'm trying to find out why my auto oil cooler fan is not turning on as I believe it should when it gets hot enough. In the first pic it shows a 12v "relay switch" with three prongs that is attached to wires on the relay switch in the second pic. The second pic has power to it, I know because my tester says so. I didn't seem to get power from the relay it the first pic though. Then, I touched the tester to the middle stud on the 12v relay that has a "B" nest to the stud, it sparked pretty good and then the engine on the K5 shut off and won't even turn over now. All the fuses in the fuse panel are good. The relay in the 2nd pic still has power. Could I have fried the 12v relay? Please help. Sh!t like this reeeeeeeeeeeeeeeeeaaaaaaaaaallllllllly bothers me because of my lack of knowledg e.