I have a 2004 Nissan 350Z and have over heating problems. It just started out of the blue one day. When it first started as long as the fuse was in the fans would stay on even with the car off so the fuse had to be pulled and put back in for driving.. I keep blowing the 40 amp Radiator Fan fuse under the hood now and as soon as I put it in it either sparks and blows OR gets extremely hot and blows.. I changed both fans putting OEM ones in, Changed the Temp switch and still blows the fuses.. I'm at a loss can someone please help??