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international 4900 heater work in hi speed only

Discussion in 'Truck & Equipment Repair' started by bob00, Oct 27, 2012.

  1. bob00

    bob00 Senior Member
    Messages: 143

    hi,

    my international 4900 heater work in hi speed only do i have to change the fan motor or there is a resistor pack somewhere

    note that i did not check yet i just want to know before i start working on it


    thanks
     
  2. jhenderson9196

    jhenderson9196 Senior Member
    Messages: 615

    I bet on resistor
     
  3. clark lawn

    clark lawn PlowSite.com Addict
    from NE ohio
    Messages: 1,233

    High speed only is a resistor. Tell me what year and I can tell you where it is.
     
  4. bob00

    bob00 Senior Member
    Messages: 143

    thanks its a 98
     
  5. xtreem3d

    xtreem3d PlowSite.com Addict
    Messages: 1,548

    Clark..are you an International wiz or just have the same truck?
    Steve
     
  6. clark lawn

    clark lawn PlowSite.com Addict
    from NE ohio
    Messages: 1,233

    Im a mechanic at an International dealer.
     
  7. clark lawn

    clark lawn PlowSite.com Addict
    from NE ohio
    Messages: 1,233

    Ill look it up tomorrow, I can't get the older stuff to open on my computer, may have to use an actual book. I can tell you that it in an air duct I just can't remember exactly where. I don't get to do much easy stuff like that.
     
  8. xtreem3d

    xtreem3d PlowSite.com Addict
    Messages: 1,548

    Clark,
    Would you know where to find the reverse light switch on an allison trans in an older S 1900 series truck?
    TIA,
    Steve
     
  9. bob00

    bob00 Senior Member
    Messages: 143

    i am not sure about your truck steve but i know some alison have the nsbu ( neutral start back up ) switch on the driver side and it should look like this

    [​IMG]
     
  10. clark lawn

    clark lawn PlowSite.com Addict
    from NE ohio
    Messages: 1,233

    Bob, the resistor should be on the inboard side of the blower motor housing, between the blower and the dog house. It is a half moon shaped with an electric plug on it.

    Extreem can't help you with that one. We rarely get anything that old in. All the newer ones run all the lights through the body controller.
     
  11. bob00

    bob00 Senior Member
    Messages: 143

    thanks a lot clark btw do you know wath can cause fuel leak in coolant ?

    i got to drain the coolant thank sometime cause it got full of fuel dealer tell me i could be injector cup and they say its a 5k job cause they have to pull the head out ????

    the engin is a dt 466e 98

    thanks
     
  12. clark lawn

    clark lawn PlowSite.com Addict
    from NE ohio
    Messages: 1,233

    Most likely that's what it is.