It's not overheating. Cooling fans don't run, I can't use my a/c at this time. I bypassed the fuse box relay and the fans run. I ohms tested wiring after the fuse box relay, seems ok. The coolant sensor tests ok according to the manual. While the fans where running I unplug the fan relay under the headlight and the fans turned off. Does that mean the relay works? What else is there to test?