4wd serv

  1. S

    4wd serv light u1440 not shifting into 4wd

    I am working on a 2016 Ram 1500 5.7 4x4. I have a 4wd serv light on and no lights on the buttons on the transfer case switch. They do light up briefly with key on. I have 12v to the switch and 7-9v on the orange wire. I am getting a code u1440 as well. Checked the plug on the dtcm and found...

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