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Old 12-21-2013, 08:13 AM   #1
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Wiring problem

Hi All,

I thought our 2002 Dolphin had a transmission problem, but it seems it's a wire loom problem. National (I assume like all manufacturers) uses a custom harness on their coaches. They pull the harness off the rolling chassis (workhorse) and install the custom harness that runs thru-out the whole coach.

A ground or two in the custom harness is causing the tranny to think it's got a problem and going into failsafe mode.(3rd gear and reverse is all I can use).

Has anyone else had a problem like this or are we the first to experiance this mess???

Regards, Howard
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Old 12-21-2013, 12:21 PM   #2
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I would think a good Allison Shop or Workhorse Shop could run a new ground wire.

Fred
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Old 12-21-2013, 04:42 PM   #3
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We live in Indio. My recommendation is call Redlands Truck and RV. Talk with Keith or Karen @1-888-249-0124. There close to where the 330(210) and the 10 in Redlands. California Exit off the 10. I have nothing but good things to say! Tell them PJ said to call.
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Old 12-22-2013, 07:13 AM   #4
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Thanks PJ, It's actually going in to Redlands Truck & TV on Monday.
We were hoping to use the coach over the holidays, but I don't think that's going to happen now.
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Old 12-22-2013, 08:06 AM   #5
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Had this problem on my Tradewinds, turned out to be a ground wire going directly to battery.
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Old 12-22-2013, 09:01 AM   #6
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Hamshog
I had similar problems with my Allison M3060 6 speed transmission, (on 2 different occasions).

The first time it was a bad wire from the batteries to the Allison VIM, (vehicle interface module?)........
BTW, that repair cost me $1,500.00 at an "authorized" Allison shop!

The second time it was a bad relay in that module, which I diagnosed and repaired myself for $6, (the cost of a new plug in relay).

Here is a link to a pic of the VIM: Allison Transmission VIM Relay Module: nwrvsupply.com

Good luck!

Mel
'96 Safari, 132k miles
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