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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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.
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  • Reviews (58)
  • Q & A (370)
  • Videos (53)
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Roadmaster Accessories and Parts - RM-156-25

  • 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.


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   (58 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:

OK...did the job, but kit should include diode block. 682693



- 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:

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:

Ordered 3 parts: RM-156-25; RM-156-75 and DW05745-10. All received very quickly, as is the case when I purchase from etrailer. More importantly, I get a 'live person' when I call for assistance and the service rep. is always knowledgable ( not an answering service that "will have someone call back". Time was spent with me answering all my questions and providing suggestions and opinions when I as for them, related to my project. Great company, great service - keep up the great work! 693892



- RM-156-25
by:

So happy to have found this product. It will keep my Dinghy tow car battery charged up. The people at etrailer were very nice and helpful. 675094



- 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:

I installed this baseplate on my 2003 Honda CRV myself. It was a challenge for an inexperienced mechanic but successful in spite of that. Following the clear instructions, the unit fit well into the CRV chassis. Installing it myself has also given me confidence in towing that I may not have had by giving that task to someone else. I wired the CRV and RV 6 way and 7 way connectors including power to charge the CRV's battery while towing. After towing the car for several thousand miles, I am very satisfied with the base plate, tow bar, and installation. 681269



- 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 bought and installed base plate and wiring on a 2018 Ford C-Max hybrid car. The wiring was a little complicated due to the hybrid setup on the car, however, everything worked out well. I have done this on several other cars I have towed behind my motorhomes. All products and help from etrailer.com was excellent. The video presentation was very helpful. 681635



- 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:

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:

Great company fast service 727099



- RM-156-25
by:

I am completely impressed and satisfied with this incredible product. Fits perfectly on my F150 and installed with ease. I was most impressed by the quick response and service of etrailer, it shows they truly value and care about customer needs. 721646



- RM-156-25
by:

Very good product and the installation video was excellent on your website. I will continue buying products from etrailer due to the videos - very informative! 719002



- RM-156-25
by:

Great product and great people to deal with. 714091



- RM-156-25
by:

I got this product in order to hook up a way to charge my car being pulled by my A class motor home. The product was received the way it was described on the web site. I have yet to get it hooked up but I see no problem with this seemly it looks to be quite an easy project. I have ordered several items from etrailer and have never been disappointed with their items. i will order from them again. 705483



- RM-156-25
by:

Too much money for three terminal connectors and wire that was too short to reach from battery to receptacle. Had use my own wire. Why a circuit breaker instead of a fuse holder that would not have exposed terminals? 698166



- RM-156-25
by:

Good kit I think the wire should be about 2ft longer a one size larger 696891



- RM-156-25
by:

2015 Jeep Wrangler Rubicon Unlimited...kit was complete and easy to install. Still installed and working one year later! 695712



- RM-156-25
by:

Spoke with customer service to get exactly what I needed. Product shipped same day, received product in perfect condition. Service and product was excellent. David 693950



- RM-156-25
by:

Comes with instruction sheet as well 682901



- RM-156-25
by:

Great customer service 683030



- RM-156-25
by:

The wire gauge seemed light to me so I substituted a heavier wire (probably unnecessary), but otherwise I was very satisfied with this product and the usual great service I received from etrailer.com. 681543



- RM-156-25
by:

Great Service Jerry J 672630



- RM-156-25
by:

I am glade the products are available. I am happy with the guick shipping & delivery. However, there are a couple of issues with the rectifier I received with the towed vehicle charge kit I recever for my Chev Spark. 1. 2 self tapping screws were included in the kit. However, there are no tabs on the rectifier for the screws to attach the rectifier to the car. 2. The posts on the rectifiers are to long for attaching one ring terminal. 3. There should be rubber or plastic cover for the terminals to prevent accidentally shorting them. Other then these issues, I am grateful for the kits, if they work as planned it will be great. One less thing to do when towing my Chev Spark. I hope these issues will help improve your product. 664411



- RM-156-25
by:

First, the customer service was excellent! Then after installation we have taken a long trip totaling over 1000 miles. The longest leg of the trip was almost 8 hours driving. The charge line worked perfectly, and we had no problems whatsoever with the battery! What a relief from having a dead battery at the end of each trip! 663782



- 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:

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



- 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


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  • Installing a Towed Vehicle Battery Switched Charging Line on 2016 Ford F53 Chassis Motorhome
  • For your 2016 Coachmen Mirada 35LS, to find a switched power line I recommend using a circuit tester like # 40376. Then you will use the Roadmaster Battery Charge Line Kit for Motorhomes # RM-156-75 with solenoid # TR118665 after the circuit breaker with the center post connected to your switched power line. This with make sure that power is only drawn from the motorhome when the ignition switch of your Coachmen is turned on. Then on the towed vehicle (toad) side you can use the Roadmaster...
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  • Parts Needed to Flat Tow 2016-2017 GMC Terrain or Chevy Equinox
  • We have everything you need to pull your new GMC Terrain or Chevy Equinox behind your RV with all 4 wheels on the ground. To do this you will need a base plate kit, a tow bar, safety cables, a lighting solution, and a supplemental braking system. These two vehicles are extremely similar so the needed parts will be the same for either option. Starting with the base plates, I recommend the Roadmaster EZ5 Base Plate Kit # RM-523184-5 if the vehicle does not have adaptive cruise control...
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  • Parts Needed to Flat Tow a 2018 Jeep Cherokee Trailhawk
  • Can you be more specific on if you are referring to the price of the parts or an installation? If it is the parts, there are a number needed and I'll be happy to let you know what they are if you need recommendations.
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  • Recommended Flat Towing Setup for a 2018 Jeep Grand Cherokee Limited
  • For your 2018 Jeep Grand Cherokee Limited I recommend starting with the Demco Tabless Base Plate Kit # DM9519291. Then you can use the Demco Commander Tow Bar - Motorhome Mount - 2" Hitch - 6,000 lbs # DM9511012 which has the included safety chains as well as the integrated adjustable head for proper fit. For your tow bar wiring I recommend the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267 as well as the charge line kit # RM-156-25. This kit will allow you to...
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  • Recommended Flat Towing System for a 2010-2012 Dodge Ram 1500
  • For a 2010-2012 Dodge Ram 1500 you will be able to flat tow your vehicle behind a motorhome. To do so you will need baseplates, a tow bar, tow bar wiring, a supplemental braking system and some other small components. Here are my recommendations: For base plates, I recommend the Roadmaster EZ kit # 52289-1. This is an easy install with some Loctite # LT37420 and will give you removable arms for a clean look when not in use. Then for your tow bar, I recommend using the Roadmaster...
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