Does the harness control the rpm of the fans? I have 05/06 brand new e-fans and these thing crank some huge rpm! They a very loud. My fans on low are louder than my Dad's 05 GMC 1500 on high speed?! The harness was built by Casper's Electronic's. Today i borrowed a 06 yukon denali of a local lot and swaped out the fans to see if it was the fans, same thing with mine. It cranked the rpm's! I'm thinking it has to be the wire harness. Help if anybody is out there! Thank-You! By the way i have an 04 Yukon Denali.