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Roadmaster Hy-Power Diodes (Qty 2)

Roadmaster Hy-Power Diodes (Qty 2)

Item # RM-792
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RM-792 - Diodes Roadmaster Tow Bar Wiring
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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 Satisfaction Score:

Customer Reviews

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

Average Customer Rating:  4.9 out of 5 stars   (224 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


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....


Item as listed


Works as it should easy install


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


Work well on my Jeep Wrangler p


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


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.


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


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.


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

no problems so far
Peter - 10/11/2021


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.


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


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


Easy install and instructions


Easy to install and worked as advertised. Installed 6 diodes and Curt inverter inside tail lights vs. inside of vehicle having to remove panels. Saved hours of work.


I just installed them and they work as they should. I was isolating lighting on an equipment trailer for a brake and turn circuit. Now it does not backfeed.


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!


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.


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


Hi quality diodes. Worked as I needed.


Product as advertised. Must wrap with tape and use dialectic grease to prevent failure of this part. Other then my haphazard initial wrapping, the product worked very well.


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!


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

Show More Reviews

See what our Experts say 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...
  • Do I Need Diodes When Using Utility Light as Reverse Lights
    Yes, I recommend to use the Roadmaster Hy-Power Diodes part # RM-792 to prevent electrical feedback since you are using the lights for both utility lights and reverse lights. A diode has 2 inputs and one output and will allow power to only flow one way. I have attached a diagram for your reference.
    view full answer...
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  • 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...
  • 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...
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  • Replacement Diodes For A 2018 Jeep Wrangler JL
    If the diode is bad then you can replace it with the Roadmaster Hy-Power Diodes (Qty 2) Item # RM-792. A bad diode does not allow current to flow in either direction. A multimeter will display OL in both directions when the diode is opened. A shorted diode has the same voltage drop reading (approximately 0.4v) in both directions. Since you have the wiring all pulled out it's also a good time to check for any kinks or cuts in the wiring and replace/repair as needed.
    view full answer...
  • Is a Converter Needed For a Flat-Tow Wiring Harness On a 2020 Toyota Tundra
    The flat-tow trailer wiring harness I recommend for a 2020 Toyota Tundra is the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit part # RM-15267 which comes with everything that you need. In regards to the converter, this won't be required. The Tundra does have a separate lighting system which means the stop and turn signals are on separate circuits. However, the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit while hooked up to the coach will just use the brake light bulb...
    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...
  • 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...
  • 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...
  • 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...
  • 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...
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  • 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...
  • 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...
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  • 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...
  • Brake Pedal Causing Turn Signals to Flash Briefly With Tail Light Converter 118158
    Thank you for your purchase of the Vehicle to Vehicle Tail Light Converter # 118158. Based on the scenario you mentioned, it does sound like there is likely backfeeding happening that is causing the turn signals to briefly flash when you hit the brakes. The best remedy for this would be what you mentioned, which is to use diodes, the Roadmaster Hy-Power Diodes # RM-792. I have added a link below to a video review for you to check out as well if you'd like.
    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...
  • Tow Bar Wiring For 2011 Honda Fit Flat Towed By Motor Home With Combined Wiring System
    You will need the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit part # RM-15267 to wire the 2011 Honda Fit with the separate system to flat tow it with the motor home with a combined system. I have attached a wiring diagram below of how this installs. The brake and turn signals sent by your motor home to the Honda Fit will be carried on a single wire so the Honda's brake lights will flash for the turn signals as well which is common. If you want to retain separate turn and brake...
    view full answer...
    Image 1 for
  • Are Extra Diodes Needed for Separate Lighting on RV And 1995 Geo Tracker With 15267 Lighting Kit
    Thank you for your purchase of the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267. In regards to diodes, since your RV has separate lighting, and your 1995 Geo Tracker has separate lighting, if you want your Tracker to retain its separate turn and brake signals, you will need a converter and two more diodes. What you would need is the Vehicle to Vehicle Tail Light Converter # 118158 and the Roadmaster Hy-Power Diodes (Qty 2) # RM-792.
    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...
  • Installing Roadmaster Diode Wiring Kit # RM-15267 with Separate Wiring on RV and Towed Vehicle
    If both your motorhome and towed vehicle have a 3-wire system (separate stop and tail lights), then a converter like the Tow Ready # 118158 should not actually be needed. The converter is only needed if your motorhome has a 2-wire system (combined stop and tail lights) and your towed vehicle has the separate, 3-wire system. I have attached a wiring diagram that shows exactly how the kit should be installed for your specific application, where both the motorhome and vehicle have a separate...
    view full answer...
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