bing tracking image
  1. Accessories and Parts
  2. Roadmaster
  3. Tow Bar Wiring
  4. Diodes
Roadmaster Hy-Power Diodes (Qty 2)

Roadmaster Hy-Power Diodes (Qty 2)

Item # RM-792
lowest price pledge
Our Price: $24.91
You Save: 30%
Accessories and Parts
Orders above $99 qualify for Free Shipping
Shipping Weight: 0.17 lbs
In Stock
RM-792 - Diodes Roadmaster Tow Bar Wiring
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos


Need help with installation?
Locate installers near me
1-800-940-8924 to order Roadmaster accessories and parts part number RM-792 or order online at Free expert support on all Roadmaster products. Guaranteed Lowest Price and Fastest Shipping for Roadmaster Hy-Power Diodes (Qty 2). Accessories and Parts reviews from real customers.
  • All Info
  • Reviews (200)
  • Q & A (0)
  • Videos (1)
  • Photos
  • Why etrailer?

Roadmaster Accessories and Parts - RM-792

  • Tow Bar Wiring
  • Diodes
  • Roadmaster

Roadmaster Hy-Power Diodes

Diodes permit electrical current to flow in only one direction - from the motorhome to the car - preventing electrical feedback and the damage it can cause to the towed car's electrical components.


  • Qty: (2) Diodes
  • Reduces wiring hassles
  • Trouble free operation
  • Includes detailed wiring instructions
  • Maximum load is 85 amps per diode

Note: 4 Diodes are required for most applications (1 left turn/brake, 1 right turn/brake, 2 for tail lights - each side).

792 Roadmaster Hy-Power Diodes

Video of Roadmaster Hy-Power Diodes (Qty 2)

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-792 Review

Speaker 1: Today we're taking a look at the ROADMASTER Hy-Power diode. Now, this will allow motor homes or RVs to power the lights on the tow vehicle without power feedback. The diodes allow electrical current to flow in one direction. So, that'd be from the motor home to the vehicle or to the car. This prevents any electrical feedback and the damage it may cause to the electrical components.This is available in a variety of quantities, so you can get a one pack, a two pack, three pack, or four pack. All options are available at

For a one pack, use part number RM-790, for a two pack, use part number RM-792, for a three pack, use part number RM-793 and for a four pack, part number RM-794.The spade connectors allow for easy, trouble free, wiring connections. Also, on the back of the packaging, it has detailed wiring instructions, so that's really going to be helpful. So, when you get these, please do not discard the packaging because it has the nice wiring instructions on the back side.The aluminum heat sync helps prevent over heating. The self stick pad on the back allows for easy and secure mounting. Maximum load is 85 amps per diode and please note that four diodes are required for most applications, one for the left turn and break, one for the right turn and break and then two for the tail lights, one per side.That's going to do it for today's look at the ROADMASTER Hy-Power diode..

Customer Reviews

Roadmaster Hy-Power Diodes (Qty 2) - RM-792

Average Customer Rating:  4.9 out of 5 stars   (200 Customer Reviews)


I purchase these to set up my toad (CR-V) with the Road master 7 to 6 wiring kit along with the 2 back into 3 wire module to allow for me the use the turn signal lights (Yellow) operate separately from the brake lights so that the toad lights all work as they were set up by the manufacturer. This way also allows you to avoid having to buy the brake light relay if your vehicle brake lights are energized by the mechanical function of your braking system. Your overall cost is relative and as stated all of your lights work instead of the typical stop/tail/turn signal bulb on each side.

still great looks and works professionally
Carl - 06/10/2020


Perfect for connecting the tail lights from my RV to my car on the car dolly.


Good product with excellent service! I can now use my reverse lights as work lights without back feeding my truck. Works great to correct those who have a have a habit of driving behind you with high beams on....


Work well on my Jeep Wrangler p


As always very best service and know what they talking about!!!


Bought these and found them to do the job with ease.

no problems so far
Peter - 10/11/2021


Easy install and instructions


I bought these diodes to replace two that the connectors corroded to the point the taillights on the towed vehicle wouldn’t work. The old ones lasted 6-7 years which is pretty good. When I hook up the new ones I’m going to put some waterproofing over the connectors.


1950 Spartan Royal Mansion. Thank you for your ongoing help and wide array of products!!!


good quality materials, connections are very well sealed from the elements. everything needed was provided my order was delivered on time


Can use these for allot more than just a towed vehicle. I used them for my loading lights on my trailer to help with backing the trailer at night. Just pulled reverse power wire from 7 pin to original cargo light wiring. Works great.


I was very impressed with the… Not only was the ordering very simple and effective and done in less than a few minutes I received the package in a very timely manner! Also I called the office spoke with Michelle and got the best customer service possible with an additional order… I will highly recommend to all of my friends!


Hi quality diodes. Worked as I needed.


Product worked as advertised tail lights on my Jeep work great when towing with my RV.
Diode packaging has helpful wiring diagrams on back.


Bought these diodes formy license plate lights on my toad. The wiring kits only come with 4 diodes which would not allow the license plate lights to be light when towing.


I needed these to wire a TOAD (tow vehicle). They have worked as advertised.

The plus is that they are quality products.

The con is that they are not cheap.

Over a year old and still working well. High quality. Etrailer had the best prices around.
Ron - 06/23/2017


overall it was an easy set up but some of the wiring on the drivers was about 8 in to short


I haven't installed the product yet, but it was exactly what I needed. Diodes of this type are not the easiest thing to find. Etrailer had them, and not only is their website laid out well, but the service and shipping were very fast.


Working great.


Product worked exactly as expected. Very clear and detailed instructions. Great service and shipping as usual from e-trailer.


I am very happy with the product, I installed them and now my lights work great.
I was very please with my customer service rep. she knew her product line and worked with me to fix my problem. Thanks


Easy to install them in my old jeep wrangler for the flat towing!


Easy to install and worked great. Makes 4 on the ground easy to hook up to RV.


as described and fast shipping
for the good service etrailer


Excellent product, great directions.

Show More Reviews

Ask the Experts about this Roadmaster Accessories and Parts

  • What is the Maximum Voltage of the Roadmaster Diode RM-792
    I spoke with my contact at RoadMaster and the maximum voltage of the Roadmaster Hy-Power Diode, item # RM-792, is 24 volts. The maximum amperage is 85 amps.
    view full answer...
  • Flat Tow Wiring for a 2013 Mini Countryman
    Your 2013 Mini Countryman uses a 3-wire lighting system. That means there is a wire for the turn signals, stop lights, and taillights. You will need to install a diode on each of these circuits to prevent power backfeed. If you take a look at the attached photo/article this will give you a better idea of how to wire them properly. If you need an additional two diodes for the extra wires you can use part # RM-792.
    view full answer...
    Image 1 for
  • Can Roadmaster Diodes be Used with 6 Volt Power
    Yes our diodes like the part # RM-792 can be used with 6 volt system as they can be used with up to 24 volt systems.
    view full answer...
  • Can Diodes be Used to Combine Brake Lights and Turn Signals
    What you need is a converter to take the separate turn and brake light circuits and combine them. You will need converter # RM-732. It will take the separate signals and combine them so on the output side you have a green wire for right turn and brake and a yellow wire for left turn and brake. A diode is just a gate. It cannot discern the difference between the brake signal and the turn signal. So if you were turning left or right and braking at the same time chances are the higher draw...
    view full answer...
  • Recommended Tow Bar Wiring for Separate Wiring on Both RV and Toyota Tacoma
    For your 2002 Toyota Tacoma, I recommend the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267. This kit will allow you to wire your Tacoma to accept the RV's tail, brake, and turn signal lights for flat towing. Since you have separate wiring on both the RV and vehicle, you will just need to install 2 additional Diodes # RM-792. I have attached an image that clarifies the wiring on a separate to separate application. In addition to the tow bar wiring, you will also need...
    view full answer...
    Image 1 for
  • Can One Diode be Used Instead of Two If Tapped Into After a Splice
    Yes, the Roadmaster Diode part # RM-792 or part # RM-690 can be installed after the two reverse light circuits are already spliced together. The diodes are basically just a one way check valve for electricity so as long as you are not exceeding the circuit then you will not have any issues.
    view full answer...
  • How To Install Roadmaster Universal Hy-Power Diode Wiring Kit On 2015 Cadillac SRX
    There should be 4 diodes included with the # RM-154 wiring kit you received. I have attached a couple drawings that show how the diodes should be installed for a towed vehicle with separate wiring(turn signal and brake signal use different wires). You would put a diode on both wires on your SRX. If you have separate wiring on the motorhome as well as your towed vehicle then you will need 2 additional diodes like part # RM-792. If you check out the attached drawings you will see that...
    view full answer...
    Image 1 for Image 2 for
  • Can Diodes for InvisiBrake be Installed on Wiring for Trailer Plug of Towed Vehicle
    Although it would be easier to install the diodes like part # RM-792 on the trailer connector, for the InvisiBrake # RM-8700 to work properly the diodes need to be installed at the rear of the bulbs. The reason for this is that the 4-Way trailer connector recieves the signal "after" the lights so they wouldn't be effective.
    view full answer...
    Image 1 for
  • Difference Between Roadmaster Hy-Power Diodes # RM-792 and # RM-794
    The only difference between the Roadmaster Hy-Power Diodes # RM-792 and # RM-794 is the quantity of diodes included with the kit. The # RM-792 includes two diodes while the part # RM-792 includes four. Otherwise the diodes themselves are exactly the same. I have attached a short video review below that you can check out as well.
    view full answer...
  • Can Roadmaster Hy-Power Diode be Used to Keep DRL Function from Backfeeding
    Diodes like the Roadmaster Hy-Power Diode # RM-790 are designed to keep circuits from backfeeding into each other so this should work just fine for 2 inputs and 1 output. If you need 2 of these diodes we have them kitted together as part # RM-792.
    view full answer...
  • Roadmaster InvisiBrake Battery Charging Capabilities While Flat Towing
    Yes the Roadmaster InvisiBrake Supplemental Braking System Item # RM-8700 will connect directly to your towed vehicle's battery and charge it while driving unlike most braking systems that would actually drain your battery. Some notes to consider on this product are: This product does not work on vehicles with a non-electric hydroboost braking system. When using TrailerMate wiring with the InvisiBrake, it will be necessary to purchase an additonal two diodes, ( item # RM-792 - sold...
    view full answer...
  • Diodes For Roadmaster Diode Wiring Kit RM-15267 to Toyota Yaris & Motorhome With Separate Lighting
    Thank you for your purchase from etrailer of the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267. Since your motorhome and Toyota Yaris both have separate lighting, you will need extra parts, which are just two additional diodes: - Roadmaster Hy-Power Diodes (Qty 2) # RM-792 I have added below the only complete wiring diagram available which shows the wiring. The unconnected wires do not terminate, you will use a jumper to connect them.
    view full answer...
    Image 1 for
  • Why Do the Amber Turn Signals Not Work With the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring
    In regards to the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit part # RM-15267, this kit is designed to carry signals from the motorhome to the towed vehicle. The motorhome's trailer wiring is a combined circuit so that is how it will be transferred to the vehicle. If the vehicle has separate stop/turn signal circuits then they will simply both be combined into one whereas the brake lights work as brake and turn. If you like, you can keep them separate but you would need two...
    view full answer...
  • Troubleshooting Diodes Not Functioning When Installed on a 2001 Honda CR-V
    Before wiring your 2001 Honda CR-V with diodes, you will need to determine if it has combined tail light wiring or separate tail light wiring. Combined tail light wiring carries the turn and brake signals on the same circuit and one bulb on each side of the vehicle carries the running lights, brake lights, and turn signal functions behind a red lens. On a vehicle with a separate tail light wiring system, the turn signals are on a separate circuit from brake lights, often carried behind...
    view full answer...
  • Tow Bar Wiring System to have Separate Turn Signals and Brake Lights on 2017 Buick Envision
    Legally the dingy lights don't have to have separate brake lights and turn signals but you can certainly wire it up that way if you want. I do not know which lighting system you have but the whole kit for separate dingy lights is # 154-792-118158. If you already have a 4 diode kit then you will just need 2 additional diodes # RM-792 and converter # 118158. I have included a diagram showing how the 6 diode system wires up. If you have something other than a 4 diode kit let me know what...
    view full answer...
    Image 1 for
  • Are Roadmaster Kit Diodes and Wiring Converter for Isolated Stop Lamp Available Individually?
    The Vehicle to Vehicle Tail Light Converter # 118158 is absolutely available apart from the Roadmaster 6-Diode Universal Wiring Kit for Towed Vehicles with Separate Lighting # 154-792-118158. Then for the additional diodes you need beyond what you currently have you will use the Roadmaster Hy-Power Diode - (Qty 1) # RM-790 or package of 2 # RM-792. The prices are on each product summary linked or on the individual product pages.
    view full answer...
  • Parts Needed to Wire a 2008 Ford Edge with Diodes to Flat Tow Behind an RV
    To wire a 2008 Ford Edge with Diodes for flat towing, you will actually need a total of 6 diodes OR you need to use the 4 you have and a Brake-lite Relay, # RM-88400. To add two diodes use # RM-792. I have included a link to the instructions for the 6 diode wiring method. The Brake-Lite relay is needed on vehicles with separate lighting if the towed car is wired using a 4-diode kit (instead of a 6-diode kit). There are additional diagrams and instructions for the relay on the product page.
    view full answer...
  • Recommended Installation of Towed Vehicle Wiring With Separate Functions of 2009 Honda CR-V
    The Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267 will be a great option for your 2009 Honda CR-V. When your turn signal is on and you are braking simultaneously, your vehicle will have the solid brake light until you release the brake. This system does have a way to override that however. For applications that have separate lighting like your CR-V, this kit will cause your brake lights to function as both brake and turn signal lights. A wiring converter # 118158...
    view full answer...
  • Troubleshooting Toad Wiring on 2017 Subaru Crosstrek with 3 Wire System
    The Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267 was a great choice for your 2017 Subaru Crosstrek. You did have a connection mistake as the amber blinkers should not be lighting up when the brakes are applied. You simply connected the wrong vehicle wire to the diode. You want to tap into the tail light wire with that diode and not the turn signal wire as the system coming from your motorhome will have the brake and turn signals combined. Your vehicle has a 3...
    view full answer...
    Image 1 for
  • Flat-Tow Wiring for a 1988 Suzuki Samurai with Combined and Separate Signals
    The way your 1988 Suzuki Samurai is currently setup, you have both combined and separate lighting systems. The combined system means the stop and turn signals are on the same circuit whereas the separate lighting system means the stop and turn signals are on a different circuit. You would need to either choose the separate or combined lighting circuits in order to attach to the RV's wiring. The Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit part # RM-15267 has everything you...
    view full answer...
  • Running Lights on 2001 Chevy S-10 Not Lighting Up Using Diode Kit for Flat Towing
    The first thing you are going to want to check is if running light power is making it all the way back to the diodes installed on your 2001 Chevy S-10. You would do this by connecting the truck to the back of the RV (or other vehicle you are using) and turn the running lights on on the tow vehicle. Then use a circuit tester such as # 40376 if you need one. If there is no power on the input wire from the RV/tow vehicle then the issue is somewhere ahead of the diode. It could just be a wiring...
    view full answer...
  • Will the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit Fit a 2006 Scion xB
    Yes, the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit part # RM-15267 will work on your 2006 Scion xB. The universal design of the system works on practically any vehicle which is why it is such a popular option. It also comes with pretty much all that you need to complete the task including wire connectors, zip ties, etc. The Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit system will cause your brake lights to function as both brake and turn signal lights. This...
    view full answer...
  • Are Roadmaster Diodes and Converter Box 118158 Sold Individually
    Diodes are available separately as part # RM-790. The converter box part # 118158 is also separately available as well. To order a pair of diodes you can also just order the part # RM-792.
    view full answer...
  • Can a 6-Diode Tow Bar Wiring System be Installed on a 2006 Dodge Durango
    You can use a 4- or 6-diode kit on your 2006 Dodge Durango. If you want to have the separate turn signals function then you will need the 2 additional diodes # RM-792 and a converter # 118158. It will wire up like in the diagram that I have included on this page. If you just use 4 diodes then the Durango brake lights will function as both brake lights and turn signals when it is connected to the RV for flat towing.
    view full answer...
    Image 1 for

< Previous
123. . .7

Do you have a question about this Accessories and Part?

  • Why

    At we guarantee:
  • Highest quality accessories and parts for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate accessories and part information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Robert G
Expert Research:
Robert G
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Laura H
Updated by:
Laura H
Employee Dustin K
Video by:
Dustin K
Employee Cole B
Installed by:
Cole B
Employee Bradley B
Installed by:
Bradley B

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.