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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:
Note: 4 Diodes are required for most applications (1 left turn/brake, 1 right turn/brake, 2 for tail lights - each side).
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
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..
Average Customer Rating: 4.8 out of 5 stars (281 Customer Reviews)
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.
When converting 4 pin to 7 pin, I used this kit as a source for trailer aux (4-pin brown) after other troubleshooting failed. A shop installed my 4 pin controller and it turns out my car doesn't supply a voltage to the quick-clipped lead for brown (and has an empty light bulb holder reserved for another model). Yes the leads in the kit are thin, but so are stock leads pumping 12v.
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.
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.
Indestructible diode. Do not wire under vehicle. Rain, Snow & Salt will rot the terminals off.
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.
Nice product. Works as described. Saves causing damage to vehicles electrical system.
It fit my Explorer perfect and works great when I tow it behind my motorhome.
They work great. No issues.
work great
Ronald L.
5/29/2017
You sell the best products
Excellent way to prevent backfeed on tow and towed vehicle.
I needed to add the diode to the wiring to complete installing the Brake-Lite relay. etrailer made it easy to order and receive it.
These things worked perfectly for my needs. I used one on my 4500 Chevy Kodiak air compressor for the air ride seats. I wanted to be able to turn the compressor on/off without starting the truck, and still have it run when the ignition switch is on. These diodes allow that to happen. I also plan to add one to control the reverse lights. It will allow me to use the reverse lights when I load things in the nighttime without having to start the truck and put it in reverse.
etrailer is a breeze to work with and always has what I need. Not sure yet on the quality of these parts, they are replacements for some installed less than a year ago. We'll see if these next 2 last a little longer.
Great little part that does the perfect job of protecting my electrical circuit between my fifth-wheel trailer and my truck. It does a great job of keeping the 12 volt power flowing in the correct/one-way direction.
Used on a trailer to add a strobe function on my existing trailer lights, and not backfeed to the truck. Has worked great for over a year now, in snow and rain it hasn’t failed.
I have placed a few orders with etrailer and have been very satisfied with the quality and arrival time of each order.
E trailer is easy to work with and has great product support.
The diodes are great, but the wiring term. should be weather seal type.
Product shipped promptly and arrived in good condition and on time…
easy install, after a year, no issues
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Walter
7/29/2022
Perfectly