Roadmaster Wiring Kit with Smart Diodes for Variable Voltage LED Tail Lights
(56 reviews)
Price: $145.46
In Stock
Roadmaster Wiring Kit with Smart Diodes for Variable Voltage LED Tail Lights
Item # RM47ZR
Our Price: $145.46
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- All Info
- Reviews (56)
- 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 - 2025 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 - 2025 Jeep Wrangler
- 2021 - 2025 Jeep Wrangler 4xe
- 2021 - 2025 Jeep Wrangler Unlimited
Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
- Wrong item was ordered
- etrailer mistake
- 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 (56 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: Dale 12/28/2023
The wiring kit had excellent directions & video which made the install a breeze. It would be even better if it lighted more of the tail lights and brake lights. Most likely it is because of my vehicle design. We did a 7700 mile trip with no issues and worked as expected. I would recommend this item.
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: Joseph05/04/2024
A complicated setup for the newer 4-wire tail light systems made easy with the online video featuring the make/model that I was wiring. Thank you.
by: John 02/13/2024
Easy ordering and fast shipping
Had everything I needed
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: Charles 01/11/2024
by: Larry 04/08/2023
2022 Jeep Cherokee
Ty
by: Robert 02/10/2024
2023 Jeep Gladiator
by: Keith 02/08/2024
by: John 05/06/2024
by: Rick08/24/2023
by: Jim 06/30/2023
by: Mike02/02/2023
by: Patrick 02/01/2023
by: Kevin 07/31/2023
2022 Jeep Wrangler 4xe
by: 05/27/2023
2022 Jeep Wrangler Unlimited
25
56
Show More Reviews
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Do you have a question about this Tow Bar Wiring?
Info for this part was:
Video by:
Andrew K
Video by:
Schuyler H
Video by:
Ethan 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
Video Edited:
John S
Updated by:
Wilson B
Updated by:
Carrie F
Test Fit:
David F
Test Fit:
Ryan G
Test Fit:
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Written by:
Mike S
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Jenny N.
9/20/2023
I definitely will have our Customer Service team reach out to you.