Roadmaster Battery Charge Line Kit for Towed Vehicles

Roadmaster Battery Charge Line Kit for Towed Vehicles

Item # RM-156-25

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Roadmaster Accessories and Parts - RM-156-25
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  • Tow Bar Wiring
  • Battery Charge Line Kit
  • Roadmaster
Kit allows up to 15 amps from your RV's battery to be used to maintain the charge of your towed car's battery while the car is being towed. Charge line connects to the 6-way or 7-way plug on your vehicle. Requires separate charge line in RV. Call 800-298-8924 to order Roadmaster accessories and parts part number RM-156-25 or order online at etrailer.com. Free expert support on all Roadmaster products. Guaranteed Lowest Price and Fastest Shipping for Roadmaster Battery Charge Line Kit for Towed Vehicles. Accessories and Parts reviews from real customers.


  • All Info
  • Reviews (38)
  • Q & A (325)
  • Videos (46)
  • Photos
  • Why etrailer?

Roadmaster Accessories and Parts - RM-156-25

Kit allows up to 15 amps from your RV's battery to be used to maintain the charge of your towed car's battery while the car is being towed. Charge line connects to the 6-way or 7-way plug on your vehicle. Requires separate charge line in RV.


Features:

  • Maintains the battery charge in your towed vehicle while the car is being towed
    • Provides just 15 amps to avoid overcharging
  • Connects battery to 6-way or 7-way plug at the front of your towed car
  • Receives power from your RV
    • Requires Roadmaster's motor home battery line (RM-156-75 - sold separately) if no charge line is present in your RV
  • Includes 14-guage wire, split wire loom, circuit breaker, and hardware
  • Made in the USA


156-25 Roadmaster Battery Charge Line Kit for Towed Vehicles







Video of Roadmaster Battery Charge Line Kit for Towed Vehicles


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Roadmaster Tow Bar Wiring RM-156-25 Review

Speaker 1: Today we're going to take a look at the Roadmaster Battery Charged Line Kit for towed vehicles. Now this kit will allow up to 15 amps from your RV's battery to be used to maintain the charge of your towed car's battery while the car is being towed, and it does provide just 15 amps to avoid overcharging. This will connect the battery to your 6-way or 7-way plug at the front of your towed car. Receives the power from your RV, so it does require a separate charge line. Now if there's no charge line present in your RV, it will require Roadmaster's Motor Home Battery Line, which is part number RM-156-75, which we do sell separately on our website, and is listed on this product page as a related product.This part will include everything laid out here on the table. The 14 gauge wire, the split wire loom, the circuit breaker, all the hardware and connectors to hook it up, a couple of cable ties to take up any slack in the wiring, and even a nice set of detail installation instructions on how to install everything.

This part is made in the U.S.A. That should do it for the review on the Roadmaster Battery Charged Line Kit for towed vehicles.


Customer Reviews

Roadmaster Battery Charge Line Kit for Towed Vehicles - RM-156-25

Average Customer Rating:  4.7 out of 5 stars   (38 Customer Reviews)

Kit allows up to 15 amps from your RV's battery to be used to maintain the charge of your towed car's battery while the car is being towed. Charge line connects to the 6-way or 7-way plug on your vehicle. Requires separate charge line in RV.

- RM-156-25
by:

The product was exactly what I needed to keep the battery of my towed vehicle charged and it was very easy to install.I would recommend it for everyone that has a motor home and a tow vehicle. 544210



- RM-156-25
by:

I have a battery charger cable from my RV to the towed car. My battery is in the rear so the instructions state I can attach the wires to the battery connector points up front. But then it says to attach the charger thing as close to the battery as possible. Question - Do I put the charging thing in the rear or the front 582538


Comments

According to Roadmaster, its best to install the circuit breaker which is the small box with the two terminals on it that I believe you were referring to as close as possible to the battery.

-- Mike L - 11/15/2018

45748

- RM-156-25
by:

The products I ordered were all delivered earlier than I expected and were of good quality. All the products are installed and work as they were designed to perform. When researching what I needed on the web I had some questions. Kim P. answered all my questions and proceeded to take my order so I didn't have to complete the order on line. If you are lucky to get Kim on the phone rest assured you have a dedicated employee who will get you the answers you seek. 470810



- RM-156-25
by:

Does not say you have to have a additional connect for this to work 488095



- RM-156-25
by:

Product fits the need, very good instruction to do the install. 472048



- RM-156-25
by:

This product does what it's supposed to. I bought it from here instead of a place like Amazon BECAUSE of the customer service! Best around. They listened to my point of view and helped me make a decision for ME. 357941



- RM-156-25
by:

When towing my Honda CR-V behind my motorhome, I had to run the car engine about every 2 hours to keep the battery from losing all charge. I found an easy solution in the battery charge kit RM-156-25 which used the power from the motorhome engine through the existing towing umbilical to keep the CR-V battery charged. Installation instructions were easy to follow and an etrailer.com online video gave an advanced look at the process. This saves me time and energy not having to jump or recharge the CR-V battery and also gives flexibility as to where and when I stop. If you don't have existing power available from the towing vehicle, a kit, RM-156-75, is available to provide that power. 377641



- RM-156-25
by:

this does not isolate your battery from feeding back into your motorhome, this is simple a circuit breaker with a piece of wire and connectors. if it was a real kit it should have a protective diode to insure issues in the towed vehicle do not interfere with the charging system in your motorhome, as it is this is just a jumper between the alternator/battery in the motorhome and the alternator/battery in your towed vehicle. 477658



- RM-156-25
by:

I ordered all the parts required to safely flat tow out 2017 Jeep Cherokee Trailhawk from etrailer.com. The only part they didn't have was the Mopar Flat Tow Enhancement kit Jeep requires to flat tow this model. Ordering from them was great, the website is easy to use and I was able to locate all the pieces compatible with my specific vehicle. The expert recommendations help my decision choosing the right parts. I ordered from etrailer even though I found some of the parts on other websites a little cheaper. I chose to pay a little more because of all the effort etrailer has put into installation videos and guides. I was very pleasantly surprised to learn from etrailer that they have a price match guarantee! So my equipment consisted of the following Mopar Flat Tow Enhancement Kit (from Jeep) Roadmaster Battery Charge Line Kit for Towed Vehicles Mighty Cord 7-Way RV Style Trailer Connector - Trailer End WesBarg 7-Way, RV-Style Connector w/ 6' Long Coiled Cable Trailer End Pollak Black Plastic, 7-Pole, RV Blade-Style Trailer Socket - Vehicle End Hopkins Custom Tail Light Wiring Kit for Towed Vehicles SMI Stay-IN-Play DUO Supplemental Braking System Roadmaster Brake-Lite Relay Kit for Towed Vehicles Blue Ox Alpha Tow Bar - Motor Home Mount - 6,500 lbs Blue Ox Base Plate Kit - Removable Arms Blue Ox Tow Bar Cover - Aladdin, Aventa LX, Aventa II The installation videos are great but not all inclusive. Take the time to read the instructions that come with the parts. This is a major project, I took about 30 hrs over a full week but as you'll see in the pictures I took s few extra steps to make a cleaner look. Some of those extra steps: The base plate install requires the bumper be modified cutting off a flange on each side, I spray painted this to prevent corrosion. In the install video of the baseplate on the drivers side they use an extra quick link (not included) to run the safety cable around the wiper fluid reservoir. I took the time to remove it and run the safety cable behind it. I didn't want our nice new vehicle to look like it can be towed so I played the brake away switch and 7 way trailer plug behind the license plate, so when not being towed our vehicle looks great! Some things to be aware of. The Brake air cylinder that mounts to the brake pedal with four bolts may need longer bolts, it did on our Jeep. Spend the money for weather tight heat shrink crimp fittings. The Hopkins wire harness was about 1.5 feet short to get to my plug location. Buy extra zip ties, electrical tape and split loom. I recommend reading all the various installation manuals and watching all the videos because the various components integrate together and if you install one at a time you'll be doing a bunch of extra work. The brake light relay is a real pain in the butt, not because of the hardware but because of the location of the brake light switch which is very hard to get to. Overall I am very happy with the products and how the installation looks. We haven't towed it yet but do not expect any problems. 410271


Comments

Still very happy with our purchase. We’ve towed over 10k miles and have had zero issues with our tow setup. I’ve shared my experience with several other RVrs and recommended your company for their needs. Thank you,

Roy - 07/30/2018

41667

- RM-156-25
by:

Very good service. William B was very helpful in getting me what I needed to hook up my GMC Terrain to my motorhome. Now, I have to install it all. Hopefully the installation instructions that William sent are as good as the rest of my ecperience with etrailer. 659338



- RM-156-25
by:

Works great. Glad I went with the flat tow route rather than dolly. etrailer install videos made selection and installation as easy as possible. Will definitively use etrailer when setting up next tow vehicle. 658100



- RM-156-25
by:

Easy to install 650398



- RM-156-25
by:

Great customer service 641037



- RM-156-25
by:

Product helped me hook the battery on my tow vehicle to charge it when being towed. The recommendation of doing the install during the mounting of baseplate saved a lot of work and time on the videos on etrailer. The corregated wire cover tends to let the wires slip out thus not a 5 star rating. 639352



- RM-156-25
by:

Everything is doing very good. 635113



- RM-156-25
by:

Great Products , Fast courteous Service and would recommend to All 621538



- RM-156-25
by:

Works as advertised. Remember you'll need dielectric grease, part # 11755. 620321



- RM-156-25
by:

Easy install 616401



- RM-156-25
by:

Nice add on to help keep my tow vehicle battery charged. Also good to use for direct connection to auxiliary breaking system if your vehicle requires the battery to be disconnected when towing. 615996



- RM-156-25
by:

Perfect kit for our needs. 613874



- RM-156-25
by:

Very easy install on my 1998 Jeep Wrangler. No issues at all 611717



- RM-156-25
by:

Installed on my toad at the same time I installed the charge line kit in my motorhome. Simple instructions easy to do job. No more dead battery on the toad. 594362



- RM-156-25
by:

Product worked well directions were good 594152



- RM-156-25
by:

Excellent service. Product was everything advertised. I will use this company for anything needed. 590976



- RM-156-25
by:

Great and fast service good job 588308



- RM-156-25
by:

Works as advertised. 586151



- RM-156-25
by:

Good product with everything needed and very easy to install. 579940



- RM-156-25
by:

Does the job. Easy install. 571304



- RM-156-25
by:

Perfect. Great installation video. Works as advertised. 566683



- RM-156-25
by:

Great service. Answered all my questions about wiring my vehicle to be towed. Very friendly and helpful. 511987


Comments

Everything is still working well. Great products.

Edward - 05/21/2019

55607

- RM-156-25
by:

Another great kit. Easy to follow instr uctions. 502228



- RM-156-25
by:

I couldn't be happier with my purchase - courteous, helpful service over the phone when ordering, prompt delivery, clear instructions, first-class product at a reasonable price. I was able to mount the solenoid and complete the wiring in less than an hour. Thanks for everything. Keep up the good work! 477833



- RM-156-25
by:

I'll be installing this product in several weeks, I received my order quickly as I always have with my past orders. I have purchased before and I will buy from etrailer again, email questions are also answered in a timely manner. 468960



- RM-156-25
by:

Could not ask for better commication and service. 460946



- RM-156-25
by:

work great 453637


Comments

great I love it

Guillermo - 11/20/2018

45871

- RM-156-25
by:

Easy to install and works well. 441977



- RM-156-25
by:

easy install. Nice compact unit 389577



- RM-156-25
by:

seems to be well made 359835


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Ask the Experts about this Roadmaster Accessories and Parts
Do you have a question about this Accessories and Part?


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Info for this part was:

Test Fit:
Joe V
Video by:
Andrew K
Edited by:
Lindsey S
Installed by:
Jeff D
Expert Research:
Jameson C
Video Edited:
Joshua S
Video Edited:
Jacob T
Expert Research:
Adam R
Video Edited:
Kathleen M
Video Edited:
Dustin K
Test Fit:
Randy B
Video Edited:
Chris R
Written by:
Shelly K
Updated by:
Sarah W
Video Edited:
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