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Roadmaster Extension Loop for Towed Vehicles - Dual 4-Way Flat Trailer Ends - 6' Long

Roadmaster Extension Loop for Towed Vehicles - Dual 4-Way Flat Trailer Ends - 6' Long

Item # RM-300150-00
Our Price: $35.99
Flat Tow Wiring Harness
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Extension wiring loop with 2 trailer ends lets you connect your RV and towed vehicle. Each male end easily plugs into a 4-way flat, vehicle-end plug. 1-800-940-8924 to order Roadmaster flat tow wiring harness part number RM-300150-00 or order online at etrailer.com. Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Roadmaster Extension Loop for Towed Vehicles - Dual 4-Way Flat Trailer Ends - 6' Long. Flat Tow Wiring Harness reviews from real customers.
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  • Reviews (33)
  • Q & A (0)
  • Videos (1)
  • Photos

Roadmaster Flat Tow Wiring Harness - RM-300150-00

  • Adapters
  • Extension Cord
  • Plugs into Vehicle Wiring
  • Roadmaster
  • Universal

Extension wiring loop with 2 trailer ends lets you connect your RV and towed vehicle. Each male end easily plugs into a 4-way flat, vehicle-end plug.


Features:

  • Wiring loop lets you connect your RV to your towed vehicle
  • Dual trailer (male) ends plug into 4-way flat vehicle ends
  • 6' Long


300150-00 Road Master Extension Loop for Towed Vehicles - 2 4Way Flat Trailer Ends - 72" Long





Video of Roadmaster Extension Loop for Towed Vehicles - Dual 4-Way Flat Trailer Ends - 6' Long

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-300150-00 Review

Today we're going to be taking a look at the Roadmaster Extension Loop for towed vehicles. This wiring loop lets you connect your RV to your towed vehicle. It's going to feature the dual trailer male-end plugs that would simply plug into a four-way flat vehicle end connector. This loop has a measurement length of 6 feet long, and each connector is going to come with a dust cap. That's going to do it for today's look at the Roadmaster Extension Loop for towed vehicles.

Customer Satisfaction Score:


Customer Reviews

Roadmaster Extension Loop for Towed Vehicles - Dual 4-Way Flat Trailer Ends - 6' Long - RM-300150-00

Average Customer Rating:  4.9 out of 5 stars   (33 Customer Reviews)

Extension wiring loop with 2 trailer ends lets you connect your RV and towed vehicle. Each male end easily plugs into a 4-way flat, vehicle-end plug.

by:

Crazy expensive for 6’ of wire. Unbelievably, no one else sells the same piece of wire?!??!



by:

I had installed the ROADMASTER tail light wiring kit on my towed Jeep which included this jumper cable to connect the car to my RV. Somehow it dragged on the ground while towing and wore through some insulation and one wire. I was very glad to see I could order just this jumper cable to make my install as good as new. ROADMASTER helped me identify the part number and etrailer stocked them at a good price.

Brad

6/16/2018

Its been a year, and everything is still working great. I am more careful how I support this jumper now.



by:

First time buying a tow bar. Great experience with Jesse at errailer. etrailer videos are excellent.



by:

Hard to find item and at a great price point! I use it to connect my 90 Suzuki to my 2009 Explorer when I tow it to the beach!



by:

Checked with several RV shops, marine stores, and a place that sells trailers. The trailer placed rigged up a cable for $30. Spent more than a few hours scouring the web till I found etrailer.com and not sure of the nomenclature of what I needed, emailed their customer service with a description of the application and sent a picture of the connectors and within a couple days was sent the pic of this product. I was apprehensive at first until I viewed all the pictures then I was sold and immediately placed my order. Received the product 2 days ahead of the predicted arrival date and couldn't be happier. Highly recommend etrailer.com. I have actually bookmarked the site for later reference.



by:

Chelsea was an amazing product specialist! Knowledgeable and professional.



by:

My review is based primarily on the service I received when calling etrailer.com. I cannot brag enough on how friendly, helpful, and efficient the representative was on the phone. I needed to purchase this product as a replacement for a component which came in a larger package/bundle I had previously purchased. I described the individual item I needed, and she directed me right to it and completed my order then and there, saving me the much larger sum of money which would have been required to purchase the entire package all over again. It was so easy. I'm very impressed with not only the inventory and products, but perhaps even more so the staff and service of this great company. I highly recommend them.



by:

We ordered tow mounts, road master tow bar and some accessories from etrailer for a 2009 Suburban. All the items arrived within a few days and packed in secure boxes. After just a little drilling the mounts went right on, the instructions are very detailed and easy to follow. I highly recommend etrailer.com for your towing needs.



by:

Easy to install and needed for extending the wiring for the tow hitch.



by:

Needed make to make extension for trailer lights. Which is not easy to find. Thanks to etrailer.com, I got what I needed. Easy to order on site. Delivered in a timely manner. No complaints from here!



by:

Purchased this as a backup for the one I purchased earlier. The one that was replaced had gotten nicked when folding or tow bar.



by:

perfect for flat tow vehicle



by:

Product was just as described and met my needs perfectly. Needed a replacement quickly for a planned trip and item came on time as promised.



by:

Nice and small, bunches better than the coiled cable I had before.



by:

Exactly what I needed for towing my Jeep. Arrived quickly. The pigtail currently on there was too short.



by:

Perfect! Hard to find this cable in local stores and etrailer not only had it, but at a great price.



by:

Just what I needed and ordered
Love
this company and the quality of service and product I receive
Would and have recommended this site to others
Will be back shopping soon have another project in the works



by:

Great service, great price.
Thanks.



by:

Products were delivered promptly and were exactly what I ordered. I would not hesitate using this site again. Great service.



by:

Good quality. Fair price. Timely delive ry.



by:

This is what I needed



by:



by:

Fast Shipping. Product as described.



by:

Product was delivered as the picture lo oks



by:

Great service and availability, as alwa ys!


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Show More Reviews

See what our Experts say about this Roadmaster Flat Tow Wiring Harness

  • License Plate Mounting Bracket Solution for Ladder on Class B Motorhome
    Thank you for all of the details and photos! For your application I recommend using the Thule License Plate Holder for Bike Racks # TH35JV along with the 6' Long Roadmaster Extension Loop # RM-300150-00. This gives you exactly what you're needing and eliminates the need to hardwire connections like you'd need to do with the LED Bracket # 328-003-70BE or Optronics # LPL55CB. The Thule bracket also comes with straps to mount it so you can wrap those around your ladder rungs which will not...
    view full answer...
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  • Connecting Thule License Plate Holder # TH35JV To 4-Way Flat Trailer Connector Wiring
    Yes, you can use the Roadmaster Extension Loop # RM-300150-00 to connect to the Thule License Plate Holder # TH35JV wiring. This will leave you 2 exposed male terminals which will have power and could short out when using the turn signals and brake lights. You can protect this by covering the terminals with some Heat Shrink # DW05450 to seal away the connectors. Or so you do not have so many connections you can cut off the end connectors of the 4-way and 2-wire to connect them with Butt...
    view full answer...
  • Availability of 4-Pole to 4-Pole Trailer Wiring Extension
    We do offer both 4-foot and 6-foot 4-pole trailer wiring extensions that you can use to extend your trailer connector. For a 4-foot extension use part # HM47115; for a 6-foot extension use part # RM-300150-00.
    view full answer...
  • Availability of 8 Foot Long 4-Way Wiring Extension
    We do have 4-Way flat to 4-Way flat extension adapters available, however they do not feature a coiled wire like you mentioned in your question. I recommend taking a look at the Hopkins 4-Pole Flat Wiring Extension # HM48235. This extension measures 120 inches (10 feet) long, which is a bit longer than you need but is the closest option available. We also have a 6 foot extension loop with part # RM-300150-00. I have attached a couple short video demonstrations on these products that...
    view full answer...
  • How to Connect an RV with a 6-Way Trailer Connector to a Flat Towed Vehicle with a 4-Way Connector
    To connect your RV to your flat towed vehicle you will need a 6-way to 4-way adapter on the RV, like part # 47305B. Then to connect from the adapter to the front of your towed vehicle you can use the Roadmaster Extension Loop for Towed Vehicles # RM-300150-00. This has a 4-way vehicle side connector on each end.
    view full answer...
  • Recommended 4-way Connector Needed for Tow Daddy Wiring Harness for Dinghy Towing
    Sounds like you are looking for the just the Vehicle End 4-way flat trailer connector like the Hopkins # HM48190. This will mate with the wiring kit you have and connect to your male end 4-way plug # RM-300150-00 that you also purchased. I have linked all the above mentioned products to this page for your convenience.
    view full answer...
  • 4-Way Flat Vehicle Side Connector that is the Same on Both Ends
    We do have extension loops that are male on both ends. Take a look at # RM-300150-00. It is 6 feet long. This is currently the only option available for a 4-Way flat.
    view full answer...
  • How To Make a Trailer Wiring Harness Adapter with Two Vehicle Side Trailer Connectors
    In order to obtain a trailer wiring harness with two vehicle side trailer connectors you will need to either splice two of the Hopkins Wiring Harness with 4-Pole Flat Trailer Connector part # HM48035 into one another with the Deka Heat Shrink Butt Connector part # DW05744-5 or you could just install the Hopkins Endurance Quick-Fix Replacement 4-Way Flat Trailer Connector part # HM48190 onto the opposite end. Unfortunately, we do not have a complete trailer wiring harness like the Roadmaster...
    view full answer...
  • Parts Needed to Flat Tow a 2007 Chevy HHR Behind a Motor Home
    I looked up an online version of the owners manual for a 2007 Chevy HHR and found that it can be flat towed. It gives the following steps: First set the parking brake. Then turn the ignition key to ACC to unlock the steering wheel. Next shift into neutral. Then release the parking brake. You also have to pull fuse 8 from the floor console fuse block to prevent draining the battery. The manual also states to not exceed 65 miles per hour. Any time you ever have a flat towing question, you...
    view full answer...
  • Parts Needed to Flat Tow a 2007 Jeep Liberty Behind a Motor Home
    On the base plate kit # BX1122 the tabs are 20 inches apart on center. The only tow bars that can be used are the Avail, # BX7420, Aventa, # BX7445, Alpha, # BX7380, and Allure, # BX7460P. The most popular of these is the Avail. It also comes with safety cables so you would not have to add any. You will also need a lighting solution to flat tow the vehicle. I recommend the bulb and socket kit # RM-155. It will bypass the vehicle wiring so you will not have to splice into it. Most states...
    view full answer...
  • Parts Needed to Flat Tow a 2012 Chevy Silverado 1500 Behind a Motor Home
    Given that your 2012 Chevy Silverado 1500 could easily get over the 5,000 pound limit of the base plates you're refering to I recommend going with a different set. The Roadmaster MX base plates, # 3154-3, are generally considered more heavy duty and are recommended for trucks and SUVs. For a compatible tow bar, you will want a Roadmaster model that slides into the hitch on the RV. For a compatible tow bar that will match the capacity of your hitch and cover the vehicle weight, take a look...
    view full answer...
  • Need 4-Pole Flat Male to 4-Pole Flat Male Wiring Harness Adapter
    We do have exactly what you need to join two female (vehicle-side) 4-pole flat trailer connectors. Roadmaster offers their # RM-300150-00 extension wiring loop which has male (trailer side) connectors on both ends of a 6-foot harness. This will allow you to join the two female 4-pole connectors on the truck and trailer.
    view full answer...
  • Parts Needed to Flat Tow a 2012 Jeep Wrangler Sport Behind Winnebago 35U Gas Coach
    Flat towing requires 5 basic components: tow bar, safety cables, a wiring/lighting kit and base plates and a supplementary braking system for the towed vehicle. Since you have a Roadmaster tow bar I suggest staying with their base plates since this will avoid the hassle and expense of adapters which can be required to mate different brands' parts. You can use the link provided to see all Roadmaster base plates and the Select Vehicle Style drop-down menu at the top of the page will allow...
    view full answer...
  • Parts Needed to Flat Tow a 1993 Jeep Wrangler Behind a 2007 Chevy Suburban
    For the 1993 Jeep Wrangler, we only have base plate options (that connect to the tow bar) if the Jeep has a U-channel bumper. You can use base plates # 1409-3. These base plates are compatible with your Roadmaster Falcon 2 tow bar, # RM-525. In addition to the base plates and tow bar, you will also need safety cables like # RM-643, a lighting solution, and a supplemental braking system. For lighting there are several options. If you will not be towing often then I recommend a magnetic...
    view full answer...
  • Can a 2012 Honda Civic with Automatic Transmission be Flat Towed Behind a Motor Home
    While there are people that flat tow the 2012 Honda Civic automatic, I have found that Honda states that the vehicle should not be flat towed. You will want to consult the owners manual to verify the flat tow-ability of the vehicle. If the owners manual says not to then I do not recommend going against what Honda says. If you find that the vehicle can be flat towed then there are 5 items you will need: base plates, tow bar, safety cables, lighting, and supplemental braking. Blue Ox base...
    view full answer...
  • How to Make 12 inch 4-Way Male to 4-Way Male Adapter
    Since we don't have the exact 4-way adapter you are looking for the best option would be to use two of the # 9653P connectors and cut them both in half and then splice the two male sides together.
    view full answer...
  • Can the Wiring on Magnetic Mount Stop, Turn and Tail Towing Light Kit Be Extended
    You can add additional wire if you need to on light kit # TL21RK. You can cut and splice in the appropriate length of bonded 4-wire, # 16-4B-1. It is sold in 1 foot increments so if you needed 10 feet you would enter 10 in the quantity box. And you can use butt connectors, # 05731-5, to make the splices. I do recommend wrapping the connections in electrical tape to further protect them. Another option that will not require cutting and splicing is to use extension loop # RM-300150-00. It...
    view full answer...
  • Trailer Connector With 4-Way Male Connector On Both Ends
    We have a dual 4-way harness that has the trailer side adapter on each end that may work for you. It is part # RM-300150-00. This adapter is 6-ft long. We do not have a rigid adapter with a male connector on both ends.
    view full answer...
  • Will Roadmaster Blackhawk 2 Tow Bar Work with Roadmaster Base Plates for a 2010 Honda CR-V
    Yes, the Blackhawk 2 All Terrain tow bar will fit the XL base plates # RM-521559-4 for the 2010 Honda CR-V. Since you have already been flat towing, you probably already have safety cables but in case you do need cables use # RM-645. These are straight cables that you can use in the cable guides on the Blackhawk tow bar. You will also need lighting for the CR-V. If you are using a magnetic kit like # RM-2120 or something similar then you can continue to use that with the CR-V. If you want...
    view full answer...
  • Trailer Connector Adapter for Towing a Trailer with a Female 4-Way Trailer Connector
    I am not sure why your kayak trailer came with a female 4-way connector. In the trailer industry, the tow vehicle uses a female style trailer connector and the trailer uses a male style connector. This is the general rule. I have not heard of a vehicle coming with a male style trailer connector of any type. I have attached a photo showing what the vehicle side connector should look like and what the trailer side connector should look like. There are two solutions for this situation. It...
    view full answer...
    Image 1 for
  • Parts Needed to Flat Tow a 1995 Jeep Wrangler with a Falcon 5250 Tow Bar
    Tow bars are not vehicle specific but the base plates are. You can use the Falcon 5250 tow bar with your 1995 Jeep Wrangler as long as you first install the correct base plates, see link. Either set will be compatible with the 5250 tow bar. You will also need safety cables like # RM-643, a lighting solution, and supplemental braking. Also check the vehicle owners manual for more information on recreational towing of the Wrangler. For lighting there are several possible options. If you...
    view full answer...
  • Parts Needed to Flat Tow a 2012 Jeep Liberty Sport Latitude with Falcon 5250 Tow Bar
    The Roadmaster Falcon 5250 is compatible with the quick disconnects and all Roadmaster base plate kits. There are a few options for your 2012 Jeep Liberty depending on how it is equipped. If it does not have a rockguard or skid plate then use # 521433-1. If it does have a rockguard or skid plate use # 521434-1. I have included links to the instructions for the first set and a video install of the second set. In addition to the base plates and tow bar you will also need safety chains like...
    view full answer...
  • Roadmaster Extension Loop for Towed Vehicles Wiring Gauge
    The Roadmaster Extension Loop for Towed Vehicles - Dual 4-Way Flat Trailer Ends - 6' Long item # RM-300150-00 uses 18 gauge wires.
    view full answer...
  • Dual 4-Way Flat Connector Adapter With Two Male Ends for Flat Towing
    We have the exact part you need with the Roadmaster Extension Loop for Towed Vehicles - Dual 4-Way Flat Trailer Ends # RM-300150-00. This has two male connectors for you to plug into the harness on your Jeep Wrangler and on your RV. I have added a link to a video review of this adapter to check out as well.
    view full answer...


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Info for this part was:

Employee Frances L
Edited by:
Frances L
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee David L
Written by:
David L
Employee Laura H
Updated by:
Laura H
Employee Cole B
Installed by:
Cole B

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