94 international 3700 Dashboard shuts off sometimes

Discussion in 'International Forum' started by ManWithNoBrows, Jul 12, 2024.

  1. ManWithNoBrows

    ManWithNoBrows Bobtail Member

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    Jul 12, 2024
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    Hi guys. My dashboard in my 94 international 3700 bus occasionally shuts off, then comes back later on. My mechanic said it's a known issue and a part on the back of it burnt out. Where can I learn more about this? I searched Google, and nothing comes up.

    Anyone heard of this issue and know what's going on?
     
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  3. Deere hunter

    Deere hunter Road Train Member

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    OK, hope I explain this reasonably. There is a solenoid behind your dash. Power comes from your battery to that solenoid which runs all of your gauges and usually your heater blower motors. Then there's a hot wire that comes from your key to that solenoid that turns it all on when you turn your key on. Somewhere between your key and that solenoid, you have a short or a wire not making connection. That's usually what happens. Now I'm not sure if international works the same way as most bigger vehicles, but I'm hoping this is your problem
     
  4. ManWithNoBrows

    ManWithNoBrows Bobtail Member

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    Jul 12, 2024
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    I'll take a look. Thank you. Not sure if this is the "known issue" my mechanic was talking about, though. I'll probably have to ask him next time we talk if no one else knows what he meant.
     
  5. ManWithNoBrows

    ManWithNoBrows Bobtail Member

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    Jul 12, 2024
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    I think you mean the contactor that turns on when I turn the key. That's just what powers everything up. I took apart the whole dashboard today, resoldered all the connections on the connectors where the wires plug into. It was REALLY dusty, and some of the track looked discolored, and the plastic overlays were so dried out that they fell off. I super glued back on the overlays so I could see what's lighting up (brake pressure, parking brake, etc.)

    I put it all back together and so far no issues. It seems that it was just old and needed some upkeep. Others were saying the connectors could have issues, and that's why I touched them up, but nothing else looked bad.

    If the issue comes back, I'll probably redo all the Electrolytic capacitors on there, as over time the Electrolytic paste inside dries out, and they stop working. I'm a certified electronics technician, so it shouldn't be too much of a hassle, as long as I have the right values on hand.
     
  6. Inderjit

    Inderjit Heavy Load Member

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    This is a very common problem with the older instrument panels. I have repaired dozens of these over the years. The weight of the wiring harnesses at the connectors at the rear of the cluster causes the solder joint between the connector and the printed circuit board to fail over time. Its a simple repair for anyone with a few basic tools and some soldering skills. The unit can be damaged by static electricity so proper precautions should be taken. Some electrical solder and a low wattage soldering iron.
    I can't post pictures here for some reason so I wrote a web page explaining the repair. Let me know if you can't open it.

    http://cathearder.thsite.top/ih.html
     
  7. ManWithNoBrows

    ManWithNoBrows Bobtail Member

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    Jul 12, 2024
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    Very nice. I'm glad to see you used flux on it to keep the solder flowing clean and smooth. Remember to use a bit of isopropyl alcohol to clean it off after you finish, as that will become nasty after a while of being subjected to dust.
     
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