RV.Net Open Roads Forum: Tow a car trailer with truck camper on

RV Blog

  |  

RV Sales

  |  

Campgrounds

  |  

RV Parks

  |  

RV Club

  |  

RV Buyers Guide

  |  

Roadside Assistance

  |  

Extended Service Plan

  |  

RV Travel Assistance

  |  

RV Credit Card

  |  

RV Loans

Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Tech Issues

Open Roads Forum  >  Tech Issues

 > Tow a car trailer with truck camper on

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Sponsored By:
Brian Dennis

USA

New Member

Joined: 10/09/2019

View Profile


Offline
Posted: 10/09/19 12:06pm Link  |  Quote  |  Print  |  Notify Moderator

My Dodge 2500 Ram has a combo 7-prong plug (slide-in camper plugs in this) and a 4-pole pin plug, like you would use for a smaller boat trailer or utility trailer.

The car trailer will have a 7-prong plug on it for lights and electric brakes. Can I buy or make an adapter to plug the camper into the 4-prong plug (just while the vehicle is underway - I dont run the refrig or anything else while moving)?

Once we arrive at destination I could then plug the camper 7-prong into the truck 7-prong and run the camper normally.

Thanks for your time
Brian Dennis

Quote:

Forget about the danger...think of the fun!


romore

Okanagan valley British Columbia

Senior Member

Joined: 09/18/2010

View Profile


Offline
Posted: 10/09/19 12:12pm Link  |  Quote  |  Print  |  Notify Moderator

I don't know about buying one but would be easy enough to make, any rv or auto parts store would have the 7 pin receptacle and 4 pin plug. Make sure the 7 pin is solidly mounted to the truck chassis or box.

twodownzero

NM

Senior Member

Joined: 06/07/2014

View Profile


Offline
Posted: 10/09/19 12:17pm Link  |  Quote  |  Print  |  Notify Moderator

I'd be much more concerned about the fact that you likely don't have enough payload to deal with the tongue weight and the camper at the same time.

When I had my truck camper, I installed a plug in the box like a 5th wheel uses for my truck camper. I could have, presumably, used the 7 pin on the bumper for a trailer. With that said, I had zero payload left for any tongue weight, so short of having a DRW 3500, good luck, especially with a 3/4 ton where you're already limited on payload.

discovery4us

California

Senior Member

Joined: 05/19/2013

View Profile



Good Sam RV Club Member

Offline
Posted: 10/09/19 12:42pm Link  |  Quote  |  Print  |  Notify Moderator

Just get a 7 prong splitter and plug both in and go.

7 way splitter

boogie_4wheel

SLC, Utah

Senior Member

Joined: 09/12/2010

View Profile


Offline
Posted: 10/09/19 12:45pm Link  |  Quote  |  Print  |  Notify Moderator

Make a splitter for the 7 pole, allowing both the TC and trailer to be plugged in.

And yes, you could make a 4 to 7 for your TC lights to operate.


2005 2500 Cummins/48RE/3.73, QCLB, 4wd, BigHorn, Edge Juice w/ CTS + Turbo Timer,Transgo Shift Kit ISSPro Oil and LP pressure gauges, GDP 20/2 filters, Custom Diesel Steering Box Brace
'10 Forest River Shockwave Toy Hauler 21'
Honda EU3000I Genny

3 tons

CA.

Senior Member

Joined: 03/13/2009

View Profile


Online
Posted: 10/09/19 04:27pm Link  |  Quote  |  Print  |  Notify Moderator

You can get a round 7 to flat 4 pin adaptor at Uhaul or Harbor Freight

ajriding

st clair

Senior Member

Joined: 12/28/2004

View Profile



Posted: 10/09/19 04:56pm Link  |  Quote  |  Print  |  Notify Moderator

No idea why camper makers think a TC needs a 7-pin plug. I use a flat-5 for the TC (same as a 4 but it has reverse light wire).

From etrailer.com I bought a truck-side plug that has both the 7-pin and the flat-5 plug (flat-4 available too). I rewired the TC to take the flat-5. The TC had a 6-pin round plug and to make it worse the plug came out of the camper all the way at the front of the camper. Somebody was drinking on the job when they engineered this.

My TC wires now exit the TC at the back of the camper since the back of the camper is located at the back of the truck, and all the truck wires come out of the back of the truck. Old-timers would call this the business end. Furthermore the factory TC plug location at the front gets hidden as soon as the TC is lowered into the bed, putting it at the rear makes it always accessible.

This would be a good time to fix the dumb things they did to you from the factory…

bonus: while I was at it I also wired a 3-prong shoreline extension to exit the TC at the rear and under the floor (same as the running light wire). This way I can plug into to electricity without an electric cord having to come out of the side of the camper. This cord is just long enough to hang down to access. When it rains, this means there is no open hole on the side of the camper. Also, I can leave my camper plugged into the extension cord that runs to the front generator which is on a front receiver hitch, while driving down the road.

I will add that this is just a short extension cord, I can plug/unplug it into the actual camper umbilical by opening the access door. So, this short cord will not be live necessarily if I power my breaker box with the inverter. I shortened the camper umbilical to about 4 inches, so I keep the cord separate. works for me. since I usually am boondocking.

* This post was edited 10/09/19 05:14pm by ajriding *

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 

Open Roads Forum  >  Tech Issues

 > Tow a car trailer with truck camper on
Search:   Advanced Search

Search only in Tech Issues


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:

© 2019 CWI, Inc. © 2019 Good Sam Enterprises, LLC. All Rights Reserved. | Terms of Use | PRIVACY POLICY | YOUR PRIVACY RIGHTS