1989 Peterbilt automatic shutdown system

Discussion in 'Peterbilt Forum' started by Peterbiltswede, Jul 7, 2022.

  1. Peterbiltswede

    Peterbiltswede Bobtail Member

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    Need wiring diagram for the automatic shutdown system 1989 379
     
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  3. Bean Jr.

    Bean Jr. Road Train Member

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    Engine shutdown? That's in the ecm, and you would have about 33% chance that you would have a Series 60 in it. The other engines had mechanical pumps in 1989, so there is no shutdown.

    Unless you mean something else.
     
  4. kranky1

    kranky1 Road Train Member

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    If it was a fleet tractor at one time it may have a Kyzor system on it. I had a ‘78 K100 with a Cummins came off the John Deere fleet had one on it.
     
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  5. Peterbiltswede

    Peterbiltswede Bobtail Member

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    Yes it’s got a automatic shutdown system
    Kysor
    But someone disconnected all the sensors and the box
    I got all the new parts temp switch and oil pressure switch, coolant sensor ant the medallion shutdown module
    The truck has the flasher relay for the warning lights on the dash
    Just need to figure out which wire number goes where
    Because it’s option it’s not in the wiring diagram
     
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  6. Peterbiltswede

    Peterbiltswede Bobtail Member

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    By the way it’s got a 3406
     
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  7. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    So it just uses the module to break fuel solenoid signal?

    Looks pretty straightforward. Neat stuff, never seen that before
     
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  8. kranky1

    kranky1 Road Train Member

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    That’s how the one on my BC1 Cummins worked. Would use signal from oil pressure and water temp senders to shut the fuel off. If I had the screw run in on the back of the pump it was about 50/50 whether the shut-down solenoid went bad or the Kysor controller was fubar’d. And it had old school phone bells on everything instead of buzzers. That truck could be a little rough on a hangover.
     
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  9. SmallPackage

    SmallPackage Road Train Member

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    Never seen one of those still connected after the warranty expired. Like @kranky1 stated. On trucks with Cummins They would always glitch and shutdown fuel for stupid reasons. Everyone cut the wires on those after a few years. I have the original one in the dash of my ‘72 White. As far as I can tell it hasn’t been hooked up for 40 years or more. Lol!
     
  10. kranky1

    kranky1 Road Train Member

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    When I was a small boy there was still one of my grandfathers WB22 Whites and a Diamond T at the back of the yard I used to play in that had Murphy Gauges on the oil pressure and water temp. They were the first shut down system. Water too high or oil low they cut the ignition off.
     
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