1. Tow Bar Wiring
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  4. Splices into Vehicle Wiring
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  6. Universal
Roadmaster Universal Hy-Power Diode Wiring Kit

Roadmaster Universal Hy-Power Diode Wiring Kit

Item # RM-154
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Tow Bar Wiring

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Roadmaster Tail Light Mount Tow Bar Wiring - RM-154
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Diode Kit allows you to use your vehicle's tail lights and wiring system while preventing feedback from your RV. 4-Pole flat loop included to connect RV to towed car. Lowest Prices for the best tow bar wiring from Roadmaster. Roadmaster Universal Hy-Power Diode Wiring Kit part number RM-154 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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Roadmaster Tow Bar Wiring - RM-154

  • Diode Kit
  • Splices into Vehicle Wiring
  • Roadmaster
  • Tail Light Mount
  • Universal

Diode Kit allows you to use your vehicle's tail lights and wiring system while preventing feedback from your RV. 4-Pole flat loop included to connect RV to towed car.


Features:

  • Connects your RV's tail, brake and turn signal lights to your towed car's lighting system
  • Works with 2-wire and 3-wire lighting systems
    • 2-Wire systems (aka combined) have the stop and turn signal sent along the same wire
    • 3-Wire systems (aka separated) have the stop and turn signals sent along different wires (typically indicated by amber turn signals)
  • Prevents electrical feedback and the damage it can cause to your vehicle's electrical components
  • Kit includes:
    • (4) Hy-Power diodes
    • Molded 4-wire electrical cords - 30' long
    • Power cord - 6' long
    • 4-Way flat wire connectors for both the vehicle and RV
      • If RV has a 3-wire system (and is not already wired for a trailer connector) a converter is required (RM-732 - sold separately)
    • Ring terminal
    • Plastic loom - 3' long


Specs:

  • Max amperage: 85 amps
  • Max voltage: 24 volts


Note: For applications that have separate lighting, this kit will cause your brake lights to function as both brake and turn lights. Wiring converter kit (154-792-118158) can be purchased instead if you want to retain separate turn and brake signals.


Diode Wiring Diagram

Diode Wiring Diagram

Diode Wiring Diagram

Diode Wiring Diagram



154 Roadmaster Universal Wiring Kit with 4 Hy-Power Diodes



This Product Fits The Following Vehicles





Customer Reviews

Roadmaster Universal Hy-Power Diode Wiring Kit - RM-154

Average Customer Rating:  4.8 out of 5 stars   (257 Customer Reviews)

Diode Kit allows you to use your vehicle's tail lights and wiring system while preventing feedback from your RV. 4-Pole flat loop included to connect RV to towed car.

- RM-154
by:
2015 Jeep Wrangler

As always great customer service and delivery. I would highly recommend e trailer for all towing needs, and other products they sell. 206606


Comments
I got rid of a dolly to go with towbar, best thing Ive done so much easier to hook up and unhook than a dolly. Great product and great customer service cant beat that plus great prices.
William D - 06/22/2016

18882

- RM-154
by:
2014 Jeep Wrangler

I haven't installed this yet. But I know etrailer video will be of great help. 165408


Comments
So so had trouble with the connecters unplugging from the deodes. Not enough slack on my part
dave t - 12/12/2015

16159

- RM-154
by:
2015 Chevrolet Silverado 1500

Work as discribed. The first time for me to use the universal kit and was a little worried about the outcome but I followed the instructions and it works great. The hardest part was routing the wire around the front end area. Wire was just enough, I recommend starting at the front end and route the wire on the passenger side. This is the side of the motorhomes 7 pin plug. Remember to stay away from the exhaust (on most trucks as mine is a Chevy 1500). Product was received within 3 days of purchase which works for me. I give Etrailer 2 thumps up for great service once again. 511182



- RM-154
by:
2009 Chevrolet Cobalt

Received wiring within 3 days, included instructions and resource phone #s for help if needed. We will use them again when needed. 152248


Comments
Great. No problems.
JOANNE B - 09/20/2015

15111

- RM-154
by:
Kia

Installation on 2018 Kia Soul 486230



- RM-154
by:
2009 Smart fortwo

I installed the wiring harness yesterday and it took about 4 hours. Thats actually 4 hours of work, in reality it was more like 6 hours but most of the time was trying to figure out how to route the wiring which is not the fault of the harness. Everything worked as advertised with no gotchya's or any issues which was really surprising. I installed it on a 2009 Smart fortwo Passion which I am towing behind my motorhome. My advice for anyone using this is take your time, read the directions carefully before you start and follow them step by step and you should have no issues. 281855


Comments
Weve put about 15,000 miles on the MHcar since installing the wiring harness and have no issues what so ever which when towing is a very welcome relief. I am very happy with your product and would highly recommend it.
Dave V - 12/12/2017

31801

- RM-154
by:

Great service thanks 910201



- RM-154
by:
2021 Jeep Gladiator

Great supplier, will use again! 909363



- RM-154
by:

great product, easy, works great 905511



- RM-154
by:

Needed a 6 pin female lite plug. 901122



- RM-154
by:

899998



- RM-154
by: 10/08/2020

I installed this harness on our 2019 CR-V. Pretty simple install, just followed the instructions. Ran the harness inside the rear bumper and the plastic covers under the car all the way to the front so nothing is exposed. Plugs into the tow dolly harness so I have full function of tail and brake lights and turn signals on the car controlled from the motorhome. 898852



- RM-154
by:
2011 Jeep Wrangler Unlimited

the installation video was very good 894934



- RM-154
by:

Great customer service on the phone & email. I paid $24 for 4 to 6 day delivery; my part arrived 2 days later. We will never use another distributor! 894137



- RM-154
by:

892049



- RM-154
by:

889529



- RM-154
by:

887254



- RM-154
by:

Great customer service 887242



- RM-154
by: 09/19/2020

883492



- RM-154
by:

Husband hasnt completed the installation yet but he says will not be a problem. All our parts were delivered in timely fashion. 882264



- RM-154
by:
1999 Jeep TJ

Great kit for Towing but have it professionally installed 873308



- RM-154
by: 08/29/2020

870773



- RM-154
by:
2011 Honda CR-V

Does a good job and was easy to install. 866368



- RM-154
by:
2019 Jeep Wrangler

Very easy to install on my 2020 Jeep JL Wrangler. I installed the rear tow wiring package at the same time and used 1/2" split conduit to run the wires from point to point. This is my second time installing this kit. I used it a couple of years ago on my 2019 Jeep Cherokee and haven't had any problems with it. 863312



- RM-154
by:

Have had no problems. Worked as expected. I did have it installed. Would recommend. 862418


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Show More Reviews

Ask the Experts about this Roadmaster Tow Bar Wiring

  • Roadmaster Universal Hy-Power Diode Wiring Kit to 6 Pole Round Connector on 2016 Kia Soul
    First off, thank you for your recent purchases! It looks like you're getting your 2016 Kia Soul ready for flat towing, which is a rather large undertaking, but we're here to help make that as easy as possible. I'll start off by saying that after looking at your orders, there is at least 1 part you'll probably need if you don't already have it-but I will get to that shortly. The wiring diagram you're going to use for the Hy-Power Diode Kit # RM-154 depends on the wiring of both your RV...
    view full answer...
  • What Dinghy Wiring do you Recommend for my 2019 Jeep Wrangler Moab with Led Lights
    For your 2019 Jeep Wrangler Unlimited I recommend the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit part # RM-15267. This is our go to wiring kit in tons of cases. It has the brackets, cable, diodes and everything you will need to get your lights working properly. I linked a video that my buddy Shane did on the wiring kit on a 2019 Jeep Wrangler Unlimited.
    view full answer...
  • Is Converter Needed for 2019 Jeep Cherokee Being Flat Towed by Motorhome With Separate Wiring
    Since your 2019 Jeep Cherokee Limited has combined wiring, if your Fleetwood Bounder does have separate wiring for its brakes and turn signals, you will need to use the Roadmaster Brite-Lite Wiring Converter # RM-732 when installing the Roadmaster Universal Hy-Power Diode Wiring Kit # RM-154 on your Cherokee. However, please keep in mind some motorhomes have combined signals that are separated at the tow vehicle wiring so you will want to verify this with your motorhome manufacturer. Along...
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  • Do The Towed Vehicle's Turns Signals Get Used With the Roadmaster Hy-Power Diode Kit
    The Roadmaster Universal Hy-Power Diode Wiring Kit part # RM-154 will use the brake light bulb to display both the brake and turn signal circuits. The turn signal bulb will then not be used while the vehicle is in tow but it would still work as normal while driving the vehicle. That said, if you want to use the turn signal bulbs on the vehicle while in tow all you need to do is use the Roadmaster 6-Diode Universal Wiring Kit for Towed Vehicles with Separate Lighting part # 154-792-118158...
    view full answer...
  • Installation Instructions for Installing a Diode Kit for Tow Bar Wiring
    Sounds like you are trying to use a diode kit like the Roadmaster Diode kit part # RM-154 to install tow bar wiring on a vehicle with separate function taillights. Running the wiring kit to the front turn signal of the tow vehicle wouldn't work because it would only cause the front blinkers to illuminate. This would be pointless since it's the back lights you want to illuminate. The diodes of this kit prevent backfeeding, so the front lights would illuminate but not the back. To see...
    view full answer...
  • Wiring Harness to Flat Tow a 2014 Mini Cooper
    The Roadmaster Universal Hy-Power Diode Wiring Kit, part # RM-154 will work great for flat-towing your Cooper. Since you have a 3-wire(separate) system, the brake light and turn signals are sent along different wires. You can use a circuit tester like part # 40376 to test your wiring. Have someone sit in the driver seat and run through the functions while you test the wires at the back of the tail lights. I have attached a drawing that shows the wiring diagram for installing this...
    view full answer...
  • Wiring Harness For Lighting When Flat Towing 2015 Ram 1500 with Motorhome
    For lighting you can use the bulb and socket kit, # RM-154, and not have to worry about cutting and splicing into the vehicle wiring. This Diode Kit allows you to use your vehicle's tail lights and wiring system while preventing feedback from your motorhome. A 4-Pole flat loop is included to connect your motorhome to the Ram. I have included an installation video of this diode kit for you to check out. The Ram is a 2013 but the installation will be similar.
    view full answer...
  • Recommended Flat Towing Wiring Harness for 2000 Jeep Wrangler Towed Behind Motorhome
    I'd recommend the Hopkins flat towing wiring harness, part # HM56202. The harness is a plug and play installation, with no cutting or splicing required. You'd simply locate the point behind the taillight assemblies where the factory plug connects to the taillight. You'd unplug that connection, and plug the Hopkins harness inline at that connection. The connectors with the yellow wire plug inline on the driver's side, and the connectors with the green wire plugs inline on the passenger side....
    view full answer...
  • Troubleshooting Installation of Roadmaster Universal Hy-Power Diode Wiring Kit # RM-154
    The Roadmaster Universal Hy-Power Diode Wiring Kit # RM-154 that you referenced should not have a jumper wire between the diodes in the turn signal circuit. This jumper wire runs between the diodes for the tail and/or brake light diodes depending on the nature of the wiring in your motor home. I suggest having your installer complete the installation exactly as described by the manufacturer and as shown on the linked page for this item. I also included a video showing this kit used on...
    view full answer...
  • Parts Needed to Flat Tow a 2015 Lincoln MKX Behind a Motorhome
    You can flat tow your 2015 Lincoln MKX with all 4 wheels on the ground. This information is located in the recreational towing section of the vehicle owner's manual, page 221. There are 5 major components needed to flat tow a vehicle: base plates, tow bar, safety cables, lighting, and supplemental braking. For base plates you can use # 4408-1 if your MKX does NOT have adaptive cruise control. Or you can use # 4408-5 if it does have adaptive cruise control. For a compatible tow...
    view full answer...
  • How to Connect Diode Wiring Kit for Flat Towing a 2005 Jeep Grand Cherokee
    Yes, you would just wire the green and yellow stop/turn brake circuits from the Roadmaster Universal Hy-Power Diode Wiring Kit # RM-154 to your brake lights on your 2004 Jeep Grand Cherokee. If you want to utilize your amber turn signals on your Jeep while flat towing you can use the Wiring Kit # 154-792-118158 instead which comes with a converter and the extra diodes you need to separate your brake and turn signals. I have attached photos of both wiring options for you to reference.
    view full answer...
  • How to Wire a 2015 Ford Edge SEL to be Dinghy Towed
    Dinghy wiring the 2015 Ford Edge SEL model is quite a bit different than normal diode wiring because Ford combined the stop, turn and taillight signal on the same wire that goes to the rear facing LEDs in the taillight. To make the # RM-154 kit diodes work properly you will need 2 resistors rated for 50 ohms and 10 watts for LED tail lights or 2 rated for 5 ohms and 10 watts for incandescent tail lights, available from a local electronics supply store. You will also need to wire the...
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  • Comparing Roadmaster RM-154 and Blue Ox BX8848 Flat Towing Diode Kits
    The Roadmaster hardwired diode kit # RM-154 for flat towing a car will not differ much from a similar kit from another maker, such as Blue Ox kit # BX8848. But since the Roadmaster kit includes a protective wire loom and has been highly-rated by many more users, I would opt for the Roadmaster kit # RM-154. I linked a series of helpful articles concerning tow bar wiring options as well as installation videos for both kits.
    view full answer...
  • How to Install the Roadmaster Diode Wiring Kit # RM-154 on a 2018 Chevy Equinox Premier
    To locate which wires operate which functions when installing the Roadmaster Universal Hy-Power Diode Wiring Kit # RM-154 on your 2018 Chevrolet Equinox Premier you will need to use a Circuit Tester # 40376. Once you remove the rear tail light housing on both the driver and passenger side you will want to use the circuit tester to probe each of the 4 wires on the main plug while a buddy goes through the different light functions. You will then want to wire the following functions...
    view full answer...
  • Adapter Recommendation for a Motorhome with 7-way Towing a Tow Dolly with a 4-Way
    If your motorhome has a round 7-way with flat, blade-style pins on the inside of the connector you should have combined signals on this connector. Your motorhome may have separate circuit lights, but 99.9 percent of 7-way trailer connectors are wired for combined tail light circuits so I would be very surprised if yours did as well. You could verify this with a circuit tester like our part # PTW2993 to verify the circuits while a buddy applies the different stop and turns signals from...
    view full answer...
  • Vehicle Tow Bar Wiring for Flat Towing a 2015 Ford F-150
    I do have a solution for you, but we currently do not carry the Blue Ox BX88287 EZ Light Wiring Harness that you mentioned. To install a wiring kit on your 2015 Ford F-150 we do have the Roadmaster Universal Hy-Power Diode Wiring Kit # RM-154 which is similar to the Blue Ox BX88287 except that this option will need to be spliced in. I have attached a video of this being installed on a 2016 F-150 that you can reference. If your motorhome does not have the 4-Way flat connector that...
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  • Parts Needed to Flat Tow a 2013 Jeep Wrangler Unlimited Behind a Motor Home
    From what I have found the 2013 Jeep Wrangler Unlimited does NOT need to have fuses pulled to flat tow it. This means you will not need a fuse bypass. Consult the owners manual to confirm this and for other specific information on flat towing your Jeep. There are other items needed to flat tow your Jeep: base plates, tow bar, safety cables, lighting, and supplemental braking. For base plates I recommend the Roadmaster XL base plates # 1439-1. These base plates will fit without an...
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  • Diode Tow Bar Wiring Kit Installation Video for a 2014 Jeep Cherokee
    Yes, the Roadmaster Tow Bar Wiring Harness part # RM-154 would install in the exact same way as the Blue Ox Wiring Kit part # BX8848 that you have, so the video you referenced that I attached to the right would work as a guide.
    view full answer...
  • Wiring Diagrams for 4-Diode Flat Towing Tow Bar Wiring Kit RM-154
    I believe you are talking about the diagrams that are lower on the product page, below the description and specs, for # RM-154. There are 4 of these diagrams. I have included a picture that shows them all for you. Please note that the diode kit is not recommended if your 2015 Ford Edge has LED tail lights. I have included a link to a video showing an example installation for you. If your Edge has LED lights I recommend EZ mount light kit # EZT20B which will bypass the factory wiring...
    view full answer...
  • Recommended Flat Tow Wiring And Complete System For 2017 Ram 1500
    For your 2017 Ram 1500, I recommend the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267. This will give you the connection wire to your motorhome, the 6 way on the front of your 2017 Ram 1500 and the diodes that let you connect to your factory wiring while protecting it from overload or feedback. This will give you a much cleaner connection than the # RM-154 and give you a wired supplemental braking option. In case you haven't completed your flat tow setup yet, I...
    view full answer...
  • Installing Roadmaster Universal Hy-Power Diode Wiring Kit to 2019 Ford Ranger
    Our installers correctly wired the Roadmaster Universal Hy-Power Diode Wiring Kit # RM-154 on a 2019 Ford Ranger in the installation video; if you go to the end of the linked video (the 19:30 mark) you can see all of the lights working properly on the Ranger. It is possible the wires on your '19 Ranger may be different, which is what I'm guessing the issue is due to how you described the wrong lights going on. So you'll want to make sure you use a circuit tester such as # PTW2979 to...
    view full answer...
  • Parts Needed to Tow a 2012 Jeep Wrangler with Rock Crawler Bumper Behind a Motor Home
    If that aftermarket bumper is a Warn Rock Crawler number 74255 then yes, there are some base plates that will fit! Or if it is a Warn/Mopar bumper, part numbers 82211715, 82211715AB or 82209740AD & skid plate part numbers 82210401 or 82210401AB then we have some fits as well. For the first one, 74255, you can use # 1438-3. This bracket fits Wranglers with grille guard 74256, skid plate 74570, and winch mount plate 74950 or 74955. For the second set you can use # 1430-1. For a compatible...
    view full answer...
  • Flat Tow Wiring Recommendation for a 2015 Jeep Cherokee
    First thing you want to do is test your 7-pin with a circuit tester like part # PTW2993 to determine if it has separate or combined trailer wiring. Most likely if you have a standard 7-way at the rear of your RV it has combined circuits so that it would be compatible with most trailers. Use the chart I attached to compare what you have to what the standard wiring patterns are. For a diode tow bar wiring kit you would want the # RM-154 and then the 7-way to 4-way adapter part # PK12716. If...
    view full answer...
  • Tow Bar Wiring Recommendation For 2014 Honda CR-V
    I have attached a link to an installation video for the Roadmaster Universal Hy-Power Diode Wiring Kit, part # RM-154 on a 2014 CR-V as you requested. Everything is included in the kit to connect the tail lights on your Honda. I have attached a couple drawings that show how the wiring is run you can check out. If you have a 7-way connector at the back of your towing vehicle or RV I recommend using an adapter like part # PK12716. This plugs into the 7-way on your towing vehicle and then...
    view full answer...
  • Flat Tow Wiring Harness for 2019 Ford F-350 Super Duty
    There is a flat towing wiring harness for your 2019 Ford F-350 Super Duty, but the Hopkins one you mentioned is not a fit; it is only a fit for certain model year F-150's. There are no plug-in harnesses for your F-350 so I recommend a simple splice-in harness instead, the Roadmaster Universal Hy-Power Diode Wiring Kit # RM-154.
    view full answer...

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