Can you check the fuse for continuity with a volt meter?I had a little more time to spend on it today after work. Got the engine up to 251 degrees (about 75% on the temp gauge). The fan IS NOT coming on. Which leads me to the N5 fuse (fan power 60A/100A). Unfortunately, that fuse is part of the fuse block of all 5 or 6 "N" fuses. The fuses are mounted to a bus, or metal plate. That entire plate will need to be replaced (if that is, in fact, the problem) as the fuses are not individually replaceable. I think I'm going to call the service manager and tell him what I have figured out so far, in hopes that he will buy my story and order the part ahead of time. Thanks again, to everyone for your help...
Might possibly be a fan relay also?