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wiper intermittent relay location

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by markk, Jun 1, 2022.

  1. Jun 1, 2022 #1
    markk

    markk Medium Load Member

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    Nov 14, 2011
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    2017 579.
    Trying to find location of the relay.
    Only have a few delay settings and low speed working. I assume this is the relay going bad.
    Thanks
     
    markk, Jun 1, 2022
    markk, Jun 1, 2022
    #1
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  3. Jun 1, 2022 #2
    Goodysnap

    Goodysnap Road Train Member

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    Wiper relays and fuses are in the under hood fuse box.
     
    Goodysnap, Jun 1, 2022
    Goodysnap, Jun 1, 2022
    #2
    blairandgretchen Thanks this.
  4. Jun 1, 2022 #3
    markk

    markk Medium Load Member

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    I meant the controller that switches the speeds of motor. I heard it was inside the lever on steering wheel. Also that it was under dash. But I can't even find one for sale so I can see what it looked like. I assume these days it would be a microcontroller.
    But I guess it could just be contacts inside the lever as a rotary switch
     
    markk, Jun 1, 2022
    markk, Jun 1, 2022
    #3
  5. Jun 1, 2022 #4
    kranky1

    kranky1 Road Train Member

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    It’s just a switch in the turn signal. You’re looking for the blower motor resistor. If those trucks are the same as KW’s it’s buried inside the dash on the passenger side where no sane person would have put it.
     
    kranky1, Jun 1, 2022
    kranky1, Jun 1, 2022
    #4
    markk Thanks this.
  7. Jun 1, 2022 #5
    markk

    markk Medium Load Member

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    Not the blower motor. The wiper motor. I need to find the Intermittent relay/ controller that changed the wiper speeds and delays. I think it is inside the turn signal lever but not sure.
     
    markk, Jun 1, 2022
    markk, Jun 1, 2022
    #5
  8. Jun 1, 2022 #6
    kranky1

    kranky1 Road Train Member

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    That’s a mystery to me. All I know about the electrical system in those newer trucks is that I don’t want anything to do with them. The flasher is electronic, I’d imagine the wiper speed/delay probably is too. Might be in the steering column, that’s what would make sense, but engineers being engineers it could be buried almost anywhere.
     
    kranky1, Jun 1, 2022
    kranky1, Jun 1, 2022
    #6
    markk Thanks this.
  9. Jun 1, 2022 #7
    kranky1

    kranky1 Road Train Member

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    I just looked at a picture of the turn signal switch for that truck. That looks like a pretty big box on there to only have the signal and dimmer switches in it.
     
    kranky1, Jun 1, 2022
    kranky1, Jun 1, 2022
    #7
    markk Thanks this.
  10. Jun 1, 2022 #8
    markk

    markk Medium Load Member

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    Yep. This Pete is a wiring nightmare. Lots of problems. Hvac controls don't work right. Have to manually open and close hot/ cold door and that is a pain.
     
    markk, Jun 1, 2022
    markk, Jun 1, 2022
    #8
  11. Jun 1, 2022 #9
    markk

    markk Medium Load Member

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    Nov 14, 2011
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    It must have a switch in it since turning the "knob" on blinker arm clicks for each position just like most vehicles.
    I'll pull it out and find out.
     
    markk, Jun 1, 2022
    markk, Jun 1, 2022
    #9
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