Roadmaster Wiring Kit with Smart Diodes for Variable Voltage LED Tail Lights
(44 reviews)
Price: $139.08
In Stock
Roadmaster Wiring Kit with Smart Diodes for Variable Voltage LED Tail Lights
Item # RM47ZR
Our Price: $139.08
Will this fit?
To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
In Stock
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.
- All Info
- Reviews (44)
- Q & A (0)
- Photos
Roadmaster Tow Bar Wiring - RM47ZR
- Diode Kit
- Bypasses Vehicle Wiring
- Tail Light Mount
- Universal
- Roadmaster
- 27 Foot Long Harness
The diodes in this kit convert the 12V signal from your RV to a 9V signal, ensuring that your car's variable voltage tail lights function as intended. 4-Wire harness included for installation. Adapter cord and plug sold separately.
Features:
- Wiring kit lets you connect your RV's tail, brake, and turn signal lights to your towed car's lighting system
- Smart diodes ensure that your variable voltage, LED tail lights function as they should while your car's being towed
- Converts the 12V signal from your RV's wiring to a 9V signal so your tail lights work as intended
- Prevents electrical feedback that can damage your vehicle's electrical components
- Power coated aluminum casing on diodes is corrosion resistant and provides protection from the elements
- Kit includes 2 smart diodes, wiring harness, split loom, ring terminals, and zip ties
- Brake light relay (RM-88400 sold separately) may be required if used with supplemental braking system
- Made in the USA
Specs:
- Maximum amperage: 5 amps
- Maximum voltage: 16 volts
- Wiring harness length: 27'
- Limited lifetime warranty
This smart diode wiring kit lets you connect your RV's tail, brake, and turn signal lights to your towed car's lighting system so that you'll have the signal lights necessary for flat towing your vehicle.
Because your vehicle has variable voltage tail lights, you cannot use a standard diode wiring kit to get these signal lights. If regular diodes are used on a vehicle that has variable voltage tail lights, the bulbs will light up as though the towed car is braking whenever the tail lights are on. In other words, there will be no difference between the vehicle's brake lights and running lights. This is because variable voltage tail lights use the same wire to power both the brake lights and tail lights. They do this by using a 12-volt signal for brake lights and a 9-volt signal for tail lights.
Smart diodes correctly modulate the 12-volt signal coming from your RV to activate only the intended circuit. The result is that your vehicle's tail lights look and function as intended.
This wiring kit is designed to work with LED lights only. If your vehicle has incandescent lights, you'll need to use the smart diode kit designed for incandescent tail lights (RO94FR - sold separately) instead.
When installing this kit, you will need to add either a 4-way or 6-way round electrical connector to the front of your vehicle so you can connect to your RV when you're ready to tow. Use one of Roadmaster's coiled cable kits (RM-164-7 or RM-146-7 - sold separately) to get both the connector and the adapter cord needed for fast, easy hookup.
If your RV has separate tail light wiring, wherein the brake and turn signals run on separate wires, you'll need a wiring converter (RM-732 - sold separately) to complete this installation.
152789 Roadmaster Wiring Kit with Smart Diodes for Variable Volt and LED Bulbs
Installation Details
Alternate Instructions
This Product Fits The Following Vehicles
- 2021 - 2023 Jeep Cherokee
- 2021 - 2023 Jeep Gladiator
- 2021 - 2024 Jeep Grand Cherokee
- 2022 - 2024 Jeep Grand Cherokee 4xe
- 2021 - 2024 Jeep Grand Cherokee L
- 2022 - 2022 Jeep Grand Cherokee WK - old body
- 2022 - 2022 Jeep Grand Cherokee WL - new body
- 2022 - 2024 Jeep Wagoneer
- 2023 - 2024 Jeep Wagoneer L
- 2021 - 2024 Jeep Wrangler
- 2021 - 2024 Jeep Wrangler 4xe
- 2021 - 2024 Jeep Wrangler Unlimited
Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
- etrailer mistake
- Wrong item was ordered
- Did not arrive in time
Customer Reviews
Roadmaster Wiring Kit with Smart Diodes for Variable Voltage LED Tail Lights - RM47ZR
Average Customer Rating: 4.9 out of 5 stars (44 Customer Reviews)
The diodes in this kit convert the 12V signal from your RV to a 9V signal, ensuring that your car's variable voltage tail lights function as intended. 4-Wire harness included for installation. Adapter cord and plug sold separately.by: Kirk09/16/2023
I ordered this back in June but had not opened the package until today when a friend was here to assist me with installing it. Unfortunately, it was missing the Insta-dapt Adapter and the hose clamps. I am sure I can use regular hose clamps but definitely need Instadapt Adapter. Would you please send that to me
by: Kathleen08/11/2023
Dodge Journey
Braking system worked great on my Jeep. We towed the vehicle on a 6000 mile journey this year. We were up and more importantly, down the Rocky Mountains and the braking system never failed us. Would definitely recommend.
by: Jim07/07/2023
No hassle with installation. Just follow the instructions and all will work out.
by: Richard09/29/2023
Works perfectly. Great product and sup port
by: Mark03/03/2023
Nice kit you have great videos on installing. Works great. Road master has great products and ETrailer has great prices and service.
by: Lon 08/05/2022
2021 Jeep Cherokee
Good kit and etrailer installation video was fantastic. Install went well and was happy to have a helper when dealing with removal/reassembly of body parts.
On complaint that is directed at Roadmaster. They need to use some more appropriate self-tapping screws for taillight area. Metal is thin and self-tapping screws included are large and course threaded. The provided screws would not tighten up properly. I ended up needing to substitute some screws from my parts bin to get a good connection.
by: Joel08/17/2023
2022 Jeep Cherokee
High quality. Received fast.
by: Jim 12/09/2022
2023 Jeep Wrangler Unlimited
I have been working with etrailer for years and have always been pleased with their website and service.
by: Paul 12/23/2022
2021 Forest River Forester Motorhome
Great service, and very helpful in deciding what was needed.
by: Ronald10/17/2022
Haven’t installed yet but purchase and delivery were great
by: James 09/03/2022
2022 Jeep Wrangler
Jim B.
9/4/2023
No problems after one year. Would recommend for Jeep owners with factory LEDs.
by: Rick08/24/2023
by: Larry 04/08/2023
2022 Jeep Cherokee
Ty
by: Jim 06/30/2023
by: Kevin 07/31/2023
2022 Jeep Wrangler 4xe
by: 05/27/2023
2022 Jeep Wrangler Unlimited
by: Mike02/02/2023
by: Patrick 02/01/2023
by: Dale 04/13/2023
by: Dennis 09/19/2022
by: Travis 09/15/2022
by: Billy 09/01/2022
by: William 01/16/2023
by: Paul05/25/2023
2023 Jeep Wrangler
by: Terry 03/23/2023
2022 Jeep Cherokee
25
44
Show More Reviews
See what our Experts say about this Roadmaster Tow Bar Wiring
- Does the Roadmaster Universal Hy-Power Diode Wiring Kit Fit a 2023 Jeep WranglerYes, the Roadmaster Universal Hy-Power Diode Wiring Kit # RM-154 does work for your 2023 Jeep Wrangler as long as you do not have park sense. This will allow you to use your Jeep Wrangler's tail lights and wiring system while preventing feedback from your RV. If you do have park sense, you will want to use the Roadmaster Wiring Kit with Smart Diodes # RM47ZR.
view full answer... - Troubleshooting Roadmaster Smart Diode Kit Install Where Lights are Dim and HyperflashIt sounds like there is some wiring issues going on with the diodes of the Roadmaster Smart Diode Kit part # RM47ZR or your Wrangler does not have the ParkSense feature. This is designed to convert the 12 volt signal from your RV to the 9 volt power that your 2022 Jeep Wrangler Unlimited uses for it's taillight circuits so since you are seeing dim voltage which is usually associated with lower voltage than required to operate a light and hyperflashing my first thought is that something...
view full answer... - Parts Needed to Wire a Motorhome W/ Combined Lights to a Toad That Has Separate LightsI did some research and what I believe is happening is that your motorhome has combined lighting and your Jeep has separate and the brake lights are overriding the turn signal lights. I contacted Roadmaster and they recommend to use the Roadmaster Universal Hy-Power Diode Wiring Kit # RM-154 which include the diodes needed to fix the issue. I have attached a wiring diagram and an install video for you to refer to.
view full answer...
- Does Standard Diode Wiring Kit Fit 2021 Jeep Wrangler For Flat TowingGood question, and I checked with Roadmaster for you, and correct tow bar wiring diode kit will depend on if your 2021 Jeep Wrangler has the ParkSense proximity sensors or not. If it does have the ParkSense you will need the kit with smart diodes that ensures your tail lights get the proper voltage. The reason for that is Jeeps with ParkSense have variable voltage tail lights, which means two different voltages depending on if the signal is for braking or turning. So here is what you will...
view full answer... - Does Standard Diode Wiring Kit Fit 2023 Jeep Wrangler For Flat Towing The correct tow bar wiring diode kit will depend on if your 2023 Jeep Wrangler has the ParkSense proximity sensors or not. If your vehicle does have the ParkSense you will need the kit that has smart diodes so it will ensure that your tail lights get the proper voltage. The reason for that is Jeeps with ParkSense have variable voltage tail lights, which means two different voltages depending on if the signal is for braking or turning. If you do have the ParkSense you will need the Roadmaster...
view full answer... - How Can I Add A Charge Line To My 2023 Jeep Cherokee Trailhawk? It sounds like you have done your homework. You are correct that the smart diode kit # RM47ZR will be needed for your 2023 Trailhawk. This kit does not include a charge line. The good news is we carry a wiring kit specifically for this purpose # RM-156-25. If you already have your 6 pin socket, this kit is all you will need to run a charge from the coach. I have linked an install video below if you want to take a look.
view full answer... - Comparing Smart Diode Wiring Kits RM47ZR And RM63MRThe Roadmaster Smart Diode Kits # RM47ZR and # RM63MR are quite similar in that they both contain the same smart diodes, and wiring components. The difference is that the # RM63MR also comes with a 6-pin round plug for the front of the vehicle, as well as a coiled cable to connect the towed vehicle to the Rv 7-way plug. So unless you already have a 7 to 6 coiled cable and a 6-pin socket laying around, we recommend getting the # RM63MR, as it will come with everything you will need to wire...
view full answer... - Do I Need A Smart Diode Kit To Flat Tow My 2021 Jeep GladiatorI can help you out. If you have parksense proximity sensors you will need the smart diode kit. If you do not have this you can use the part that you have # RM-15267. Roadmaster Wiring Kit with Smart Diodes for Variable Voltage LED Tail Lights # RM47ZR. If you are having installation issues regarding wiring I highly recommend going to an RV dealer and having them take a look at it.
view full answer... - Wiring Harness Needed for Flat Towing 2022 Jeep Wrangler Unlimited Behind MotorhomeIn order for the taillights on your 2022 Jeep Wrangler Unlimited to operate in tandem with the taillights on your motorhome while flat towing, I'd recommend installing a diode system like the Roadmaster # RM47ZR if your Wrangler Unlimited has the ParkSense feature or # RM-15267 for vehicles not equipped with that feature. I've linked to an install video that you might find helpful.
view full answer... - Will The Roadmaster Diode Wiring Kit Drain The Battery On A 2022 Jeep Wrangler Unlimited If properly installed the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267 is only going to receive power from your motorhome to power the lights of your 2022 Jeep Wrangler Unlimited. If you were having issues with the lights "waking up" when not connected that would indicate an issue with the splices not be correctly done and would require them to be fixed. If your Wrangler has ParkSense Proximity sensors then you'll want to use the Roadmaster Wiring Kit with Smart...
view full answer... - Roadmaster Smart Diodes For Variable Voltage LED Tail Lights For A 2022 Jeep Wrangler UnlimitedYes, they are! The diodes apart of the Roadmaster Wiring Kit # RM47ZR are available at # RO54FR.
view full answer... - Correct Tow Bar Wiring For 2022 Jeep Gladiator With LED Lights & ParkSenseI checked with Roadmaster for you and was able to verify the exact tow bar wiring kit you need for your 2022 Jeep Gladiator with LED lights and ParkSense proximity sensors; the correct fit for your Jeep is the following: - Roadmaster Wiring Kit with Smart Diodes for Variable Voltage LED Tail Lights # RM47ZR
view full answer... - Will The Smart Diode Kit Required For a 2022 Jeep Wrangler 4xe Still Work Without ParkSense Feature?Yes, you can still use the Smart Diodes # RO54FR from the Wiring Kit # RM47ZR on your 2022 Jeep Wrangler 4xe. These will still operate your standard tail lights just fine even without having the ParkSense feature.
view full answer... - How To Power A Third Brake Light With Diode Wiring While Flat TowingThe reason the third brake light isn't coming on is because the Roadmaster Wiring Kit with Smart Diodes for Variable Voltage LED Tail Lights # RM47ZR is only being wired to the just the tail lights. To get the third brake light to activate you would need to splice in a jumper wire between the third brake light and the the "RV Brake In" on the diode. You would need an additional Smart Diode # RO54FR for the third brake light and essentially wire it the same as one of your tail lights....
view full answer... - Which Diode Tow Bar Lighting Kit for 2022 Jeep Cherokee TrailhawkYou do not need to remove a trailer brake controller from a vehicle like your motorhome when flat towing a vehicle. The brake output circuit of the brake controller won't affect anything so it can be left as-is. The braking systems for towed vehicles do not go through the traditional trailer wiring like for example the Demco SBS DUO part # SM99251 which uses the brake light signal of the towed vehicle to engage it and then it's own inertia sensor to determine how hard it applies brake pedal...
view full answer... - Recommended Base Plate Kit for a 2022 Jeep Grand Cherokee WLThe Roadmaster Direct-Connect Base Plate Kit part # RM77ZR for models with tow hooks or part # RM76RR for models without tow hooks is what I recommend for a 2022 Jeep Grand Cherokee WL. These kits typically go on the smoothest without any major modifications required and they reused existing holes when they can. They will then both work great with a tow bar like the Roadmaster Sterling All Terrain, Non-Binding Tow Bar part # RM-576. The tow bar comes with safety cables and an umbilical...
view full answer... - Are There Diode Wiring Kits Available Without The Power Cord For Flat Towing A 2022 Jeep Wrangler Yes, you can just reuse your power cord as well as the motorhome and vehicle sockets # RM-146-7 when switching to your 2022 Jeep Wrangler. We also sell the diodes and wiring separately with part # RM-152. If your new Wrangler has ParkSense Proximity Sensors then you'll need the Roadmaster Wiring Kit with Smart Diodes for Variable Voltage LED Tail Lights # RM47ZR instead.
view full answer... - Troubleshooting Dim Tail Lights While Flat Towing A 2023 Jeep Gladiator The Smart Diode kit # RM47ZR you installed is designed for use with Gladiators that have ParkSense Proximity Sensors with LED lights. If you don't have these sensors or you have incandescent lights then that could be a possible cause for the dimness. For incandescent lights with proximity sensors you would need # RO94FR instead. The next thing to check would be the installation, start by tracing the wiring from the 6-pole socket back to the tail lights. I had someone come in with a similar...
view full answer...
- Compatible Blue Ox Baseplate For A 2021 Jeep Gladiator The Blue Ox Base Plate Kit # BLU53FR is a confirmed fit for the following 2021 Jeep Gladiator models: Mojave Rubicon with factory plastic bumper Rubicon with factory steel bumper Standard factory plastic bumper As long as you have a standard factory plastic bumper or have a Mojave or Rubicon edition this baseplate will be a confirmed fit for your Gladiator. If you haven't picked out the rest of your flat towing components then I have the following recommendations for you as well: Tow...
view full answer... - Determining Wire Functions To Install The Tow-Ready Tail Light Isolating Diode SystemI always recommend checking the functions of your wires instead of just going off of an instruction manual's color guide or video to ensure you are splicing the correct wires together during installation of a diode kit like your Tow Ready Tail Light Isolating Diode System with 4-Pole Connector # TR118821. You can do this by checking the wires with a circuit tester like # PTW2992 to see which wire goes hot when each specific function (brake/left turn/right turn) is active. Note: If your...
view full answer... - Diode Kit Needed For A 2021 Jeep Wrangler With ParkSense Proximity SensorsThat is correct, if you have ParkSense proximity sensors then you'll need to install smart diodes # RM47ZR and would still need a 6-pole socket and adapter cable # RM-146-7 to connect your 2021 Jeep Wrangler Rubicon 4XE to the motorhome. The # RM-15267 I recommended before would be the correct choice if you didn't have those sensors. I've attached some videos below to help you with the installation process as well.
view full answer... - Correct Tow Bar Wiring for a 2022 Jeep Gladiator Mojave with LED Tail LightsFor your 2022 Jeep Gladiator you need the Roadmaster Wiring Kit with Smart Diodes for Variable Voltage LED Tail Lights # RM47ZR as well as the 7-Wire to 6-Wire Flexo-Coil Kit # RM-146-7. This is designed around the LED lights on your Mojave so everything will continue to work properly. Unfortunately there aren't any plug-in options that tee in behind the tail lights of your vehicle. Attached are some videos for you to check out.
view full answer... - Recommended Flat Towing Set Up for a 2021 Jeep Wrangler UnlimitedI would be happy to help you set your 2021 Jeep Wrangler Unlimited up to be flat towed behind your motorhome. I will also be detailed in my descriptions to hopefully answer as many of your questions as possible. I have also linked installation videos for all of the parts listed below. To flat tow your Jeep you will need a high low adapter, tow bar and safety chains, base plate kit, tow bar wiring kit, and supplemental braking system with a charge line. Tow Bar: etrailer SD Non-Binding...
view full answer... - Does The 2022 Jeep Cherokee Trailhawk Require a Charge Line For Flat Towing Will It Wire With 4-WayThe 7-Way to 5-Way/4-Way Trailer Adapter # TR20141 you found is for vehicles which have lamp out sensors and are towing a trailer or vehicle with led tail lights. Since your 2022 Jeep Cherokee Trailhawk should have a Charge Line # RM-156-25 I recommend using the Roadmaster 7-Wire to 6-Wire Flexo-Coil Kit # RM-146-7 to connect your motorhome to the front of your Jeep. This kit includes a 6-way you can install on the front of the Jeep. This gives you the additional wiring needed for running...
view full answer...
Do you have a question about this Tow Bar Wiring?
Info for this part was:
Video by:
Andrew K
Video by:
John S
Video by:
Schuyler H
Edited by:
Lindsey S
Installed by:
Jeff D
Expert Research:
Jameson C
Video Edited:
Joshua S
Video Edited:
Jacob T
Video Edited:
Dustin K
Video Edited:
Chris R
Video Edited:
Jonathan Y
Updated by:
Wilson B
Updated by:
Carrie F
Test Fit:
David F
Test Fit:
Ryan G
Test Fit:
Bradley B
Written by:
Mike S
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. Let us know if anything is missing or if you have any questions.
Product Experts Available Now!
Call 1-800-940-8924
Jenny N.
9/20/2023
I definitely will have our Customer Service team reach out to you.