Parts Needed to Charge Battery of Towed Vehicle while Flat Towing
Updated 10/25/2021 | Published 04/24/2020
Products Featured in This Question
Question:
Hello, I have received great advice from you and excellent parts and service from etrailor, so I am asking again! On our first tow adventure, we arrived home to discover we had a dead battery in our tow vehicle. I would like to avoid that in the future! I have been reading about systems that will help to maintain the battery while we are driving. I am currently using the Blue Ox Patriot II brake system. I am using magnetic tow lights that plug into the plug on the Coachmen Freelander RV.The Escape has to have the key in the accessory position while towing. Is there a relatively easy system to install for allowing me to charge the vehicle battery while we tow? If not, is there a more complicated system that might require some assistance for installing? Thank you
asked by: Ron H
Expert Reply:
I have exactly what you are looking for, but the ease of install can be a bit of a loaded question. If you are comfortable dealing with trailer wires such as the occasional splicing or battery terminal connection, then this install will be easier than falling asleep in a La-Z-Boy recliner. If you've never touched a trailer wire before, then I've attached a video that will hopefully put your mind at ease that you can do this yourself. This can definitely be a DIY type of installation.
To charge your battery while towing, you will want to add a battery charge line kit to your setup with part # RM-156-25. I attached a video of our installer showing this installation on a Ford Edge. This is not a vehicle specific product, so the installation process will be the same on your Ford Escape.
This process will require the trailer connector on your motorhome to have an active 12 volt battery charge pin too. Most of the time this isn't a problem on the motorhome side, but if you find that the battery isn't charging or that you don't have power on the 11 o'clock pin in your motorhome's trailer connector, then you will also want to install the the charge line kit for motorhomes, # RM-156-75. I've attached an installation video of this kit for you as well.
If you have any other questions or have any questions along the way, please feel free to reach out and I'll be happy to help.
Kelly B.
5/18/2020
I installed this kit on my 2015 Equinox. Do I need the Roadmaster Single Park Light Diode Item # RM-690?
Chris R.
5/21/2020
Chris R.
5/25/2020
Product Page this Question was Asked From
Roadmaster Battery Charge Line Kit for Towed Vehicles
- Accessories and Parts
- Flat Tow Wiring Harness
- Battery Charge Line Kit
- Roadmaster
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Base Plate for Tow Bar
- Search Results: flat tow wiring harness
- Search Results: tow bar
- Search Results: base plate for tow bar
- Video: CURT RVibrake Towed Battery Charger+ Comprehensive Review
- Shop: Demco Tabless Base Plate Kit - Removable Arms
- Search Results: vehicle tow bar brake system
- Search Results: flat tow bars
- Search Results: wiring bracket
- Shop: Roadmaster Battery Charge Line Kit for Towed Vehicles
- Video: How to Install the Blue Ox Towed Vehicle Battery Charge Line Wiring Harness - 2026 Jeep Gladiator
- Shop: Blue Ox Patriot Portable Flat Tow Brake System - Proportional
- Search Results: flat tow brake system
- Video: Blue Ox Base Plate Kit DIY Installation - 2026 Ford Maverick
- Video: Review of CURT Replacement Battery Hub RVIbrake 3 Flat Tow Portable Braking System - C34FR32ZX
- Video: Review of Blue Ox Flat Tow Brake System - Patriot Portable Proportional Brake System - BLU37TR
- Video: An In-Depth Look at the Roadmaster Battery Charge Line Kit for Towed Vehicles
- Shop: Replacement Battery for Hub for CURT RVIbrake 3 Flat Tow Portable Braking System
- Video: Review of CURT Replacement Bullseye Wireless Monitor - C69PQ
- Shop: etrailer XHD Non-Binding Tow Bar - RV Mount - 2" Hitch - 10,500 lbs
- Shop: etrailer SD Non-Binding Tow Bar - RV Mount - 2" Hitch - 6,000 lbs
- Shop: Roadmaster Direct-Connect Base Plate Kit - Removable Arms
- Article: We Used 34 RV Tow Bars, and These are the Best for Flat Towing
- Q&A: Can I Charge My Trailer Battery Using 7-Way Trailer Connector on Truck
- Shop: Trailer Wiring
- Q&A: Front Hitch For A 2025 Ford E-450 Cutaway With Jayco 27U Conversion
- Shop: Brake Controller
- Q&A: Best Flat Tow Brake System for a 2022 Ford Ranger
- Q&A: Best Battery Charge Line Kit for Flat Towing
- Article: Must-Have Flat Towing Components
on Accessories and Parts
Ron H.
4/25/2020
Thank you John, but I think I need a little more information. It appears these installs require a 7 pin hookup on the tow vehicle and the motor home. Since I use the magnetic signal lights, I do not have a hook up on the Escape. My magnetic signal lights use a 4 pin that required me to install a 4 pin adapter to the 7 pin on my motor home. All parts purchased from E-trailer Is there some other type of adapter I could use on the motor home to give me access to charge wire and an alternate way to attach it to the Escape?