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Thread: 03 2500 Electric fan swap

  1. #1
    Tuner in Training
    Join Date
    Apr 2017
    Posts
    23

    03 2500 Electric fan swap

    Cannot get the fans to activate, leaning towards a harness issue (JustChevyTrucks harness). coppied tables from a 05 silverado along with lowering the temp activation a little , had them working in special functions and waited till it was up to temp and no fans, now also cannot activate them with special functions. whatcha think I fried?Karl EFAN2500hd.hpt

  2. #2
    Advanced Tuner
    Join Date
    Jan 2015
    Location
    Arizona
    Posts
    406
    have you done any probing of the relays and see if you can get them to run or not?

  3. #3
    Potential Tuner
    Join Date
    May 2016
    Posts
    2
    Did you get it fixed? Looked at program check desired fan% to ect table...

  4. #4
    Tuner in Training
    Join Date
    Dec 2015
    Location
    SE MN
    Posts
    19
    I just did mine and used a factory harness and compared my file to yours, don't see anything off. Check over that harness.
    2003 Suburban beater
    2014 Ram 2500 Mega Cab Cummins - Hoping HPT adds support for it soon
    SOLD - Too many timing chains...2013 FX4 SuperCrew - EcoBust - 6.5' Box - Black FX Appearance Package - Tuning