Quote Originally Posted by thunder550 View Post
I dunno how yours are wired up, but this is how the Nelson harness does it. Yours could very well be different. I'm just speaking about my own personal experiences.

HD's (any of the 6.0L trucks) have the same 34" radiator that I put in my truck. I was running factory 05+ fans too. I dunno. Maybe I just had some bad luck or something, there are many people out there that seem to have good luck with e-fans, but I think I probably push my truck harder in a hotter environment than most people do.

I have the Nelson harness and it operates like I listed. Maybe your Nelson harness was faulty (please don't throw stones)?

LOL

The 34" HD radiator is almost twice as thick as the 34" Denali/Escalade radiator. Maybe you did have the HD and the fans weren't as good pulling through the thicker core?