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Old 06-06-2020, 05:08 PM   #1
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Diesel/Transmission Electrical wiring

I have a 2007 Monaco Dynasty with Cummins XL & Allison transmission. Yesterday I replaced the engine batteries, 2- 12volt in parallel. I goofed and shorted something out. I blew a 10 amp fuse in the rear run. It was labeled VIM. When I started the engine, the transmission had \\// in the display and wouldn't shift into fwd or rev, the transmission temperature gauge was just moving back and forth from cold to hot to cold. Then, I couldn't shut the engine down. I had to go to the rear and put the rear start switch to the center position between front and rear. That shut the engine down, but the coach thought key was on because the step operated with the door and the back up lights were on. The only way to get everything off was to remove the cable from the battery terminal.


I think I'm in real trouble and I can't take it anywhere to have anyone look at it. My schematics do not show any wiring for the engine or transmission.
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Old 06-08-2020, 05:25 PM   #2
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The VIM ( Vehicle Interface Module ) may have internal fuses , that need to be changed .
Did you feed 24 volts into the chassis wiring ?

The Allison series you have is probably WTEC IV ( World Transmission Electronic Control series IV ) newer that any info I have .

You say the engine trans wiring don't show in the schematics you have .
Does any chassis wiring appear , external lighting , brake system ?
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Old 06-09-2020, 10:20 AM   #3
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Thanks for your response. I don't think I have any chassis wiring. I'm guessing there might be fuses in the VIM, but I don't know where it is. A neighbor says his is in the engine compartment, but we couldn't find anything that looks like a module in there. I have a call into REV. They should be able to tell me where it was located on my chassis, but I haven't heard from them yet.
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Old 06-09-2020, 12:08 PM   #4
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Every chassis manufacturer will have a different location for the VIM, and possibly a different style of VIM all together , but because of it's interaction with the Allison ECM , it should be close by .
Below is a photo of the VIM on my F/L chassis ( in the engine compartment ) yellow circle , right beside the Allison ECM.
Second photo is , VIM, with cover removed.
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Old 06-10-2020, 09:01 AM   #5
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Skip 426,
Thanks a lot, now I have something to look for. I contacted REV and they were NO HELP whatsoever! All the tech help guy could say was "I don't know anything about that, we didn't build that coach!"
I will go out and look for something like that today.
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