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Old 07-06-2013, 02:59 PM   #1
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Fuse box location for 7pin connection '07 Allegro Bus 40QSP

I have a 2007 Allegro Bus 40QSP and not getting voltage to my left turn signal pin in the 7pin trailer plug connection. I suspect this to be a blown fuse in the Freightliner PDM (power distribution module), but I can't for the life of me locate the module.

Can anyone tell me where this is located and how to access it?


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Old 07-06-2013, 07:55 PM   #2
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On the left side of the Bus in the rear, the narrow electrical compartment should contain the box with the fuses you're looking for. On our formal '08 it was at the top of the compartment on the rear compartment wall, not the back of the compartment. Box is about 6x8". You'll need a small screwdriver to get the cover off. On mine, the CB diagram of what applied to which circuit was evidently not read by the Tiffin techs but if you use a meter you'll find your bad fuse.

2013 Tiffin Allegro Bus 43QGP
2011 Chevy Silverado 1500 Toad
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Old 07-07-2013, 12:05 PM   #3
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It appears that you have a FL chassis. In your model, the PDM may be located behind/under the front pedistal (below the radio). On newer coaches it is in the DS front compartment.

The fuses that you are looking for may not be in the PDM, but located in one of the aft compartments. The "tow" fuses on my 2012 are in the aft PS compartment.
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Old 07-11-2013, 07:43 PM   #4
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Pigman, we found it!! Thanks so much!! It was a burnt fuse so a quick fix and all systems go
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