I installed the electric fan in my 02 Suburban 2500 with an 8.1 about 4 months ago. I used the harnesses from BP Automotive (for the fans and A/C) and all was working great.... until today. I went to fire up my truck and the fans turn on about 10s after I fired it up. The truck was cold (30 degrees) so it shouldn't be calling for the fans to be on.
Any help diagnosing would be appreciated!2500 suburban BB with fans 20FEB2019.hpt