Auto fan randomly working in 379 with Detroit 60

Discussion in 'Peterbilt Forum' started by simonsocm, May 18, 2021.

  1. simonsocm

    simonsocm Light Load Member

    91
    39
    Aug 17, 2019
    0
    Checked voltages today.
    5v at map sensor (boost)
    0.83v at both coolant temp sensor and fuel temp sensor

    Decided to swap the engine sensor harness and I'm getting the same readings. Idk what the coolant temp sensor should read for voltage honestly. Hopefully the harness did something, otherwise I'm sure it's be a bad ecm.
     
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. simonsocm

    simonsocm Light Load Member

    91
    39
    Aug 17, 2019
    0
    Swapped the engine harness. It did nothing.

    Recently put new thermostats in and found out that I never had any in there. I really hate the previous owner.

    Put a Horton fan switch in the thermostat housing. Doesn't turn on when it should. I'm going to put it next to the coolant temp sensor in the back of the head when I get home next. I think the thermostat housing never gets consistently hot enough to trigger it to open.

    FYI the switch is NC 205 degree open and closes again at 194
     
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  • Draft saved Draft deleted