fan switch problem on fl80

Discussion in 'Freightliner Forum' started by ctkiteboarding, Jun 7, 2011.

  1. ctkiteboarding

    ctkiteboarding Bobtail Member

    3
    0
    Jun 7, 2011
    0
    been working on getting my ac cold this week and im just about there, vent temp at 38 *
    im having a issue or two and was hoping for some direction , the fan switch was working on all three positions but the other day the high setting stopped ,
    off , one and two still work fine,, i changed the switch out and the resistor but still no luck, i located the relay and swaped it out with another and nothing, any ideas?
    the blower motor doesn't seem tight and i dropped a small amount of oil on the shaft while i was in there and she spins very well

    kinda lost
     
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  3. clifton l

    clifton l Bobtail Member

    7
    0
    Jun 6, 2011
    vandalia,il
    0
    i may be way off on the fl80, but the 120's have a resistor with 4 wires next to the fan box. you need to test the wires on it for power on all the fan settings until you find the one not getting power to the fan. (should be the bottom one) then jump it with power to see if it turns on high. then you know the resistor is bad on the high setting.
     
  4. ctkiteboarding

    ctkiteboarding Bobtail Member

    3
    0
    Jun 7, 2011
    0
    thanks got it fixed this am the relay was bad and the relay i used to ck was bad as well shes good to go
     
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