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

Roadmaster Hy-Power Diodes (Qty 3)

Item # RM-793
lowest price pledge
Retail:$54.68
Our Price: $37.23
You Save: 32%
Accessories and Parts
Orders above $99 qualify for Free Shipping
Shipping Weight: 0.24 lbs
Quantity: 
In Stock
RM-793 - Diodes Roadmaster Accessories and Parts
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

Videos

Call 800-298-8924 to order Roadmaster accessories and parts part number RM-793 or order online at etrailer.com. Free expert support on all Roadmaster products. Guaranteed Lowest Price and Fastest Shipping for Roadmaster Hy-Power Diodes (Qty 3). Accessories and Parts reviews from real customers.
  • All Info
  • Reviews (119)
  • Q & A (3)
  • Videos (1)
  • Photos
  • Why etrailer?

Roadmaster Accessories and Parts - RM-793

  • 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.

Features:

  • Qty: (3) 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).


793 Roadmaster Hy-Power Diodes





Video of Roadmaster Hy-Power Diodes (Qty 3)

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-793 Review

Speaker 1: Today we're taking a look at the Roadmaster high powered diode. Now this will allow motor homes or RV's to power the lights on the towed 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 etrailer.com. For a one pack, use part number RM-790, for 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 treble free wiring connections.

Also on the back of the packing 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 backside.The aluminum heat sync helps prevent overheating, 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 brake, one for the right turn and brake, and then two for the tail lights, one per side.That's going to do it for today's look at the Roadmaster high powered diode..


Customer Reviews

Roadmaster Hy-Power Diodes (Qty 3) - RM-793

Average Customer Rating:  4.9 out of 5 stars   (119 Customer Reviews)


- RM-793
by:

Product works really well and looks very clean when installed. I only needed two for my application, so the 3-pack ensured I always have a spare as well. 732658



- RM-793
by:

I needed a way to flat tow my 1951 M38 Korean War Jeep (converted to 12 volt). I picked up three of these diodes (stop, Left, right) and wired them into my jeep and trailer harnesses . Now when I connect the Jeep to my tow vehicle, the Jeep tail lights slave off the tow vehicle, yet when I disconnect my tow vehicle, the Jeep light revert back to the jeep harness. Made my flat tow capability very easy. Input side is two connectors, output side is single connector. One small issue is I needed a couple extra after market solder-less connectors since the ones that came with the diodes were too large for the trailer harness wire I was using. Crimping the connectors were not a tight enough connection....but with smaller connectors, the diodes now work great. Been using them for over a year now with zero issues. 713920



- RM-793
by:

They work as expected. I installed them near a junction box for secondary backup lights on my truck. They allow me to use a switch to turn on the LED lights as well as them come on automatically when my truck is in reverse. I've recommended these to several other folks that need additional lighting solutions on their vehicles or trailers. 581073



- RM-793
by:

It fit my Explorer perfect and works great when I tow it behind my motorhome. 290236



- RM-793
by:

work great 253052


Comments
You sell the best products
ronald L - 05/29/2017

24255

- RM-793
by:

Installed 6 of these to wire up my 04 Honda CR-V as a Toad. They work great so far, lights come on from either the CR-V or the RV. Nice that they come with the terminal lugs so all you have to do is strip and crimp the wires. 223175



- RM-793
by:

Nice product. Works as described. Saves causing damage to vehicles electrical system. 208715



- RM-792
by:

Review from a similar Hy-Power in Accessories and Parts


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. 655651


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

80432

- RM-794
by:

Review from a similar Hy-Power in Accessories and Parts


Diodes work as designed. They eliminate additional lights and prevent the need to drill a hole in the tail light assembly. I used these on a previous vehicle and they are still problem free after eight years. 297661



- RM-794
by:

Review from a similar Hy-Power in Accessories and Parts


I installed these diodes on my wifes 2006 VW Jetta TDI to isolate the signal and tail light system from my tow vehicle. The system works as planned and the quality of the parts are excellent! VW/Audi products are notorious for system glitches when you drive the stock lights with a tow vehicle. I routed standalone wires from the front bumper mounted bulkhead plug to the rear of the car down the inside of the drivers side rocker panel and into the trunk area. 273306



- RM-790
by:

Review from a similar Hy-Power in Accessories and Parts


I needed to charge my tow vehicle battery by taping in to my tail lights on my motor home. This will prevent The tail lights on the tow vehicle from feeding from its own battery. My break buddy was depleting the tow vehicle battery on long trips. Solved my problem! 524458


Comments
Working great, no problems
Jon l - 06/20/2019

56873

- RM-790
by:

Review from a similar Hy-Power in Accessories and Parts


Ordered a diode for a project on my RV and it worked out fine. I just wish the price was much cheaper for such a small part. 402096


Comments
Ok
Jim - 07/06/2018

40570

- RM-792
by:

Review from a similar Hy-Power in Accessories and Parts


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. 846237



- RM-794
by:

Review from a similar Hy-Power in Accessories and Parts


Arrived fast and in great condition 824660



- RM-792
by:

Review from a similar Hy-Power in Accessories and Parts


worked great 795358



- RM-792
by:

Review from a similar Hy-Power in Accessories and Parts


Works as it should. 783045



- RM-790
by:

Review from a similar Hy-Power in Accessories and Parts


This handy item allowed me to wire up my rear bumper flush mount lights to power on with my reverse lights and also power on from a switch. Very handy! 768435



- RM-792
by:

Review from a similar Hy-Power in Accessories and Parts


Product arrived timely was exactly what I needed and installed and the product fixed my issues 760284



- RM-790
by:

Review from a similar Hy-Power in Accessories and Parts


Easy to install. Took awhile for me to understand installation but working well a year later 751598



- RM-790
by:

Review from a similar Hy-Power in Accessories and Parts


I am in awe how quickly this order was processed and delivered. Considering it had to clear Canadian customs and I ordered on a Friday , it was in my hands on Wednesday. Megan was very helpful on the phone in locating the correct parts ,processing the order and following up with tracking info. I had also chat online prior to placing the order with Mackenzie who answered all questions effectively. Combining all this with the fact etrailer has very detailed instructions with drawings on the installation and I am beyond impressed. It isn’t often we see customer service on this caliber today. As a consumer I will definitely be using them again! Oh yeah and the product needed was in stock whereas when I ordered from a well known online site (A...n) in September and told ETA would be Nov/Dec they couldn’t even deliver in that timeline? 729438



- RM-792
by:

Review from a similar Hy-Power in Accessories and Parts


Came a day early! Easy to install. Works like a charm. 720114



- RM-794
by:

Review from a similar Hy-Power in Accessories and Parts


I have used these in the past so when i got a new tow vehicle i bought them again. They make wiring up the lights on a tow vehicle a snap. I have never had one fail. 695049



- RM-794
by:

Review from a similar Hy-Power in Accessories and Parts


Product fit great. Superfast shipping and great communication! 691931



- RM-792
by:

Review from a similar Hy-Power in Accessories and Parts


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. 658792



- RM-794
by:

Review from a similar Hy-Power in Accessories and Parts


Fair price, delivered as agreed on time. Would buy again from this vendor. Only reason I did not give this five stars is that I have yet to actually hook them up in the wiring system to enable my factory lights on the towed vehicle to be operational when taken on a trip behind my RV. 656394


25
123
Show More Reviews

Ask the Experts about this Roadmaster Accessories and Parts

  • RV Brake and Towed Vehicle Brakes Both Applied via Diodes
    I spoke with my contact at TowReady and he said the brake lights will come on normally when both the brake pedal on the RV and towed vehicle via a Brake Buddy are applied. He said if either brake is pressed the brake lights will come on. When both brake pedals are pressed at the same time the brake lights will come on. He also said 2.1 amps per side is plenty to handle your CR-V's brake light. They should illuminate normally when both the RV and towed vehicle brake pedal are applied.
    view full answer...
  • Are the Roadmaster Hy-Power Diodes Water Tight
    As long as you are not exceeding the 85 amps at 12 volts per diode max load then you can definitely use the configuration in your diagram. I spoke with my contact at Roadmaster who said that the connections are not watertight but the internal components are. You would either need to find a way to make the connections watertight (as you mentioned in your diagram) or simply wipe the connections off if you were to go off-road with your 2011 Jeep Wrangler and get the diode(s) wet. We...
    view full answer...
  • Maximum Amp Rating of Roadmaster Hy-Power Diode
    The Roadmaster Hy-Power Diode # RM-790 is rated for a maximum of 85 amps. This is for a single diode but is also available in different quantities if you need: - Quantity of 1: Roadmaster Hy-Power Diode # RM-790 - Quantity of 2: Roadmaster Hy-Power Diode # RM-792 - Quantity of 3: Roadmaster Hy-Power Diode # RM-793 - Quantity of 4: Roadmaster Hy-Power Diode # RM-794 I have added links to video reviews for you to check out as well.
    view full answer...




  • Why etrailer.com?

    At etrailer.com 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:

Installed by:
Cole B

At etrailer.com 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.