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Post Info TOPIC: Truck to 5er DC


RV-Dreams Community Member

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Posts: 8
Date:
Truck to 5er DC


Plug connecting the truck to the 5th wheel doesn't have 12 vdc (truck side) I think it was pin 7 but I would have to check the diagram to be sure. All other pins have the needed voltage and the brakes, tail lights and running lights are all working when connected. I made the assumption that the 12 vdc pin was supplying voltage to the 5th wheel battery to charge it.
So, what would a 12 vdc hot pin actually be used for in the 5th wheel? Is it actually needed?
If I need to put power to it what would be a good source on the truck? There is plenty of 12 vdc around the tail gate/bumper area. It would be a long run to the cab fuses or engine batteries. A little work but buy all means "doable"
For the record we took a 2 month trip last year with this condition. We never "boondocked" long enough to drain the battery. If we had, I assumed the 12 vdc from the truck would have recharged the house battery as we drove if it was hot?
Thanks, Friz



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RV-Dreams Community Member

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Posts: 5
Date:

Friz

 

Here is a diagram for the 7 pin connector.  Not sure what type of truck you have but newer Fords with a built in brake controller don't send any charging voltage until after you press the brake pedal.  I'm not sure if other brands work in a similar manner.  Having said this you will not get much of a charge due the the wire gauge and length.

 

Mitch

7 Way Diagram - AJ's Truck & Trailer Center



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mjdenn

2018 New Horizons

Summit 39FB4s



RV-Dreams Family Member

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Posts: 27
Date:

I agree with @mjdenn.
Please try this and if it doesn't work then let us know...

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