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Old 05-26-2019, 12:08 PM   #1
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Bus shuts off when driving

My 2001 international RE 7.3 just left me on the side of the road. It was driving fine, all gauges read good, then shut off and just coasted to the side of the road. It would not even crank over, just clicked when I tried to restart. Batteries are good. When I opened the electrical panel I had power coming from the battery to what I call a solenoid then no power coming out to supply the fuse panel. I grabbed a jumper wire and bypassed the solenoid but still couldnít power the fuses. It was so strange. On the picture I circled the solenoid and where it supplies the fuse box. The solenoid and the similar one underneath it were very hot. I appreciate any advice.
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Old 05-26-2019, 12:19 PM   #2
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That solenoid is easy to get. they go bad due to the environment they're in. The doors don't seal well allowing lots of moisture in.
I've had to replace one.
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Old 05-26-2019, 01:01 PM   #3
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I also suspect one of those solenoids.
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Old 05-26-2019, 01:19 PM   #4
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had that exact thing happen with my t444 vista half way through montana once - I had recently replaced the starter. my terminology in the following will most likely not be accurate, but the fix worked nonetheless

the computer that controls fuel supply (and too much other stuff) picks up its power from the hot post of the starter, along with like 7 or 8 other things on the same post. often the ring on the end of the cable gets corroded or the nut on the post loosens enough to disallow a good connection, killing the bus.

i'd go down to starter - disconnect batt's 1st obv - pull the nut off the hot post (it's a 3/4 on mine, long socket extention worked well but i'm FE) and examine everything that draws power form there for corrosion or wear. put everything back on real nice too, I've had things wobble loose on there more than once, and solved it with a 1/4 turn of the hot post's nut.

better to check the free stuff 1st in any case - best of luck and keep us updated
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Old 05-26-2019, 01:23 PM   #5
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One is for the starting system and the other is for everything else- At least on the buses I've had. They're both the same part numbers.
Its easy to test em with a multimeter.
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Old 05-26-2019, 01:26 PM   #6
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yeah it looked like pretty much everything on a stock setup draws its power off that post, I've seriously contemplated splicing some of the stuff together into 2 or 3 larger rings instead of so many small ones... maybe another day lol

that could explain why he couldn't jump the fuses past the questionable solenoid - maybe that particular solenoid is one of those relay gates (again, probably wrong terminology) this power system uses?
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Old 05-26-2019, 02:36 PM   #7
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does the WARN light come on for 2 or 3 secxonds when you turn the key on?


if not then the computer isnt booting up and wont allow the starter to even crank..



im not familiar enough with the RE nodel to know if theres a separate chassis fuse panel or not... some of them do whiuch is where the ECM bat and ECM IGNITION fuses would be.. these are usually not dependent on those solenoids to power the engine..



also make sure something didnt come loose in the rear control box for the engine.. ie the rear kill switch wire came off or such..
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Old 05-27-2019, 01:31 AM   #8
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Originally Posted by superbusWI View Post
yeah it looked like pretty much everything on a stock setup draws its power off that post

... except for the Radio Shack device just below the solenoid!
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Old 05-27-2019, 08:34 PM   #9
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Thank you all for the help, we had to tent camp for the weekend and the cops towed it before I could get back to it. 800 bucks later itís back in my driveway. Not sure when Iíll be able to try your suggestions but Iím hoping for soon. I will keep you posted. Also, one suggestion said they are easy to test with meter. Could someone walk me through how? Thanks guys.
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Old 05-27-2019, 09:17 PM   #10
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... except for the Radio Shack device just below the solenoid!
20amp heavy duty noise filter.
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