Hi Everyone. Well, after 15 years the RV-Dreams Community Forum is coming to an end. Since it began in August 2005, we've had 58 Million page views, 124,000 posts, and we've spent about $15,000 to keep this valuable resource for RVers free and open. But since we are now off the road and have settled down for the next chapter of our lives, we are taking the Forum down effective June 30, 2021. It has been a tough decision, but it is now time.

We want to thank all of our members for their participation and input over the years, and we want to especially thank those that have acted as Moderators for us during our amazing journey living and traveling in our RV and growing the RV-Dreams Family. We will be forever proud to have been founders of this Forum and to have been supported by such a wonderful community. Thank you all!!

Members Login
    Remember Me  
Post Info TOPIC: Truck to 5er DC

RV-Dreams Community Member

Status: Offline
Posts: 8
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


RV-Dreams Community Member

Status: Offline
Posts: 5



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.



7 Way Diagram - AJ's Truck & Trailer Center



2018 New Horizons

Summit 39FB4s

RV-Dreams Family Member

Status: Offline
Posts: 27

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

Page 1 of 1  sorted by
Quick Reply

Please log in to post quick replies.

Tweet this page Post to Digg Post to Del.icio.us