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  1. Tow Bar Wiring
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  4. Bypasses Vehicle Wiring
  5. Universal
  6. Tail Light Mount
Roadmaster Wiring Kit with Smart Diodes for Variable Voltage LED Tail Lights

Roadmaster Wiring Kit with Smart Diodes for Variable Voltage LED Tail Lights

Item # RM47ZR
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Tow Bar Wiring

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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. Lowest Prices for the best tow bar wiring from Roadmaster. Roadmaster Wiring Kit with Smart Diodes for Variable Voltage LED Tail Lights part number RM47ZR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Roadmaster Tow Bar Wiring - RM47ZR

  • Diode Kit
  • Bypasses Vehicle Wiring
  • Universal
  • Tail Light Mount
  • 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.


Smart Diode Wiring Diagram


152789 Roadmaster Wiring Kit with Smart Diodes for Variable Volt and LED Bulbs



This Product Fits The Following Vehicles





Customer Reviews

Roadmaster Wiring Kit with Smart Diodes for Variable Voltage LED Tail Lights - RM47ZR

Average Customer Rating:  5.0 out of 5 stars   (1 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.

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Ask the Experts about this Roadmaster Tow Bar Wiring



  • Does Standard Diode Wiring Kit Fit 2021 Jeep Wrangler For Flat Towing
    Good 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...
  • Do I Need A Smart Diode Kit To Flat Tow My 2021 Jeep Gladiator
    I 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...
  • 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...
  • Wiring Harness Needed for Flat Towing 2022 Jeep Wrangler Unlimited Behind Motorhome
    In 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...
  • Correct Tow Bar Wiring For 2022 Jeep Gladiator With LED Lights & ParkSense
    I 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...
  • Roadmaster Smart Diodes For Variable Voltage LED Tail Lights For A 2022 Jeep Wrangler Unlimited
    Yes, they are! The diodes apart of the Roadmaster Wiring Kit # RM47ZR are available at # RO54FR.
    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...
  • Determining Wire Functions To Install The Tow-Ready Tail Light Isolating Diode System
    I 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...
  • How To Shift A 2021 Jeep Wrangler Transfer Case Into Neutral To Flat Tow
    The steps listed to transition into neutral tow mode in the online owner's manual for a 2021 Jeep Wrangler are as follows: 1. Bring the vehicle to a complete stop on level ground. 2. Press and hold the brake pedal. 3. Shift the automatic transmission into NEUTRAL or press the clutch pedal on a manual transmission. 4. Turn the engine off. 5. Shift the transfer case lever into (N) Neutral. 6. Start the engine. 7. Shift the transmission into REVERSE. 8. Release the brake pedal (and clutch...
    view full answer...
  • All Parts Needed to Flat Tow 2021 Jeep Wrangler Unlimited
    We can help you out with all the parts you'll need to flat tow your 2021 Jeep Wrangler Unlimited, and you are most of the way there. You will need different base plates though as the part number you mentioned is for earlier model Jeeps. I'll list out each of the parts needed to flat tow your '21 Wrangler Unlimited: - Base Plate Kit: Roadmaster Direct-Connect Base Plate Kit # RM-521453-5 - Tow Bar: Roadmaster Nighthawk All Terrain, Non-Binding Tow Bar # RM-676 - Wiring Kit: Roadmaster...
    view full answer...
  • Recommended Tow Bar Wiring Kit For Flat Towing A 2021 Jeep Wrangler Unlimited
    At this time there currently is not a plug in tow bar wiring kit available for a 2021 Jeep Wrangler Unlimited. Instead I recommend going with the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267. Although this won't be as easy as just plugging in some connectors I do recommend splicing kits over the magnetic light kits that you'd have to reinstall every time you want to tow and could potentially lose while towing. This wiring kit comes with everything you need and the...
    view full answer...
  • Parts Needed To Flat Tow A 2021 Jeep Wrangler
    The Roadmaster Falcon All Terrain, Non-Binding Tow Bar # RM-522 is a great tow bar for flat towing your 2021 Jeep Wrangler. It features a non-binding design and large hook up radius which makes connecting/disconnecting on any terrain a breeze. To flat tow your 2021 Jeep Wrangler Unlimited you'll also need a base plate, braking system, tow bar wiring kit, and safety cables. I have the following recommendations for you below: Base Plate: Roadmaster Direct-Connect Base Plate Kit - Removable...
    view full answer...
  • Recommended Flat Towing Equipment For A 2021 Jeep Wrangler JL
    To flat tow your 2021 Jeep Wrangler JL you'll need a tow bar, base plate, tow bar wiring kit, braking system, and safety cables. I have the following recommendations listed for you below: Tow Bar: Roadmaster Falcon All Terrain, Non-Binding Tow Bar # RM-522. This tow bar features non-binding latches and a large hookup radius to make connecting and disconnecting your vehicle on any terrain a breeze. Base Plate: Roadmaster Direct-Connect Base Plate Kit - Removable Arms # RM-521453-5. These...
    view full answer...
  • Recommended Blue Ox Flat Towing Equipment For A 2022 Jeep Wrangler Unlimited
    To flat tow your 2022 Jeep Wrangler Unlimited you'll need a tow bar, base plate, tow bar wiring kit, braking system, and safety cables. Since you already have a Brake Buddy for your braking system I have the following recommendations: Tow Bar: Blue Ox Ascent Non-Binding Tow Bar # BX4370. This tow bar features non-binding latches and a swivel function that makes it easy to connect or disconnect from your base plates, even on unlevel ground. Base Plate: Blue Ox Base Plate Kit # BX1139....
    view full answer...
  • Parts Needed To Flat-Tow a 2022 Jeep Grand Cherokee WK All Trim Packages
    In order to flat-tow a 2022 Jeep Grand Cherokee WK (All Trim Packages) you'll need a base plate kit, safety cables, tow bar, lighting, and braking system. I have attached a list with each of these parts listed below. Roadmaster Direct-Connect Base Plate Kit part # RM-521440-5 Roadmaster Nighthawk All Terrain, Non-Binding Tow Bar part # RM-676 Roadmaster Wiring Kit with Smart Diodes part # RM47ZR Brake Buddy Select 3 Portable Supplemental Braking System part # HM39524
    view full answer...
  • Recommended Flat Towing Equipment For A 2022 Jeep Wrangler Sahara
    There currently isn't a compatible Blue Ox base plate for your 2022 Jeep Wrangler Sahara. There is however the Roadmaster Direct-Connect Base Plate Kit # RM-521453-5 which is a compatible fit (standard factory bumpers). These base plates have a direct-connect connection point for quick and easy hookup as well as removable arms to preserve the factory look of your Jeep when not in use. For the tow bar I recommend the etrailer SD Non-Binding Tow Bar for Roadmaster Direct-Connect Base Plates...
    view full answer...
  • Can You Use The Blue Ox Tow Bar Wiring Kit On A 2021 Jeep Wrangler Ulimited
    For your 2021 Jeep Wrangler Ultimated, you can use either the Blue Ox Tow Bar Wiring Kit # BLU79FR you mentioned, rather than the Roadmaster Wiring Kit with Smart Diodes # RM47ZR. If you choose not to use # RM47ZR and you use # BLU79FR you will not need any additional wiring as this is a plugs into your vehicle's harness. If you choose to use # RM47ZR, then you may need the Roadmaster Brake-Lite Relay Kit # RM-88400 if you use this kit with a supplemental braking system. If your vehicle...
    view full answer...
  • Recommended Tow Bar Wiring Kit For A 2022 Jeep Wrangler Sahara Altitude
    The Curt T-Connector Custom Vehicle Wiring Harness # C96JR is for setting your vehicle to tow a trailer and not for flat towing your vehicle. Instead you'll need the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267. This kit will come with everything you need to properly send the signal from your motorhome to your 2022 Jeep Wrangler Sahara Altitude's tail lights. If you have ParkSense Proximity Sensors then you'll need the Roadmaster Wiring Kit with Smart Diodes for...
    view full answer...
  • Flat Towing Equipment Recommendations For A 2021 Jeep Wrangler Sport
    4WD models of the 2021 Jeep Wrangler are not able to be dolly towed so I recommend flat towing your 2021 Jeep Wrangler Sport. To flat tow your Wrangler you'll need a tow bar, tow bar wiring kit, base plate, braking system, and safety cables. I have the following recommendations for you below: Tow Bar: Since you said you're interested in the Roadmaster with LED lights I'm assuming you're talking about the Roadmaster Nighthawk All Terrain, Non-Binding Tow Bar w/ LED Lights - RV Mount - 8K...
    view full answer...
  • Recommended Flat Towing Equipment For A 2020 Jeep Wrangler With A Smittybilt Atlas Front Bumper
    To flat tow your 2021 Jeep Wrangler you will need a tow bar, base plate, tow bar wiring kit, braking system, and safety cables. I have the following recommendations for you below: Tow Bar: Roadmaster Falcon All Terrain, Non-Binding Tow Bar # RM-522. This tow bar features non-binding latches and a large hookup radius to make connecting/disconnecting to your vehicle easy peasy on any terrain. Base Plate: Since you have a Smittybilt Atlas front bumper you will need either the Adapter for...
    view full answer...
  • Recommended Flat Towing Components For A 2021 Jeep Wrangler
    The Roadmaster Falcon All Terrain, Non-Binding Tow Bar # RM-522 would be a great option for your 2021 Jeep Wrangler and is one of my most recommended tow bars. It features non-binding latches and a large hookup radius to make connecting/disconnecting on any terrain easy peasy. For the Base plate you'll need a Roadmaster Direct-Connect style base plate like the # RM-521453-5. These will allow you to attach to your tow bar without the need for any adapters. The arms are removable as well...
    view full answer...
  • Parts Needed To Flat Tow a 2021 Jeep Wrangler Sahara With Stock Bumpers
    For your 2021 Jeep Wrangler Sahara first you will need to start with the Base Plates # RM-521453-5. These will act as a connection point for the Roadmaster Falcon All Terrain, Non-Binding Tow Bar # RM-522 to connect on the front of the Jeep. These tow bars allow for greater maneuverability and make attaching and disconnecting your Jeep much easier. The RoadMaster Falcon All-Terrain Combo Towing Kit # RM-9243-1 provides you with the electrical components that you need to connect the Jeep...
    view full answer...
  • Does Flat Tow Wiring Kit For 2022 Jeep Cherokee Trailhawk Include Power to Battery
    The wiring kit to flat tow your 2022 Jeep Cherokee Trailhawk does not include a charge line to the battery, so you would need to get one separately and install that so the battery does not die. If your motorhome does not have a charge line you would also need that (though most do so long as your motorhome has a 7-way). Since your '22 Cherokee Trailhawk has LED lights and the ParkSense feature, there is a specific wiring harness you'll need, and I'll go ahead and list out all the parts...
    view full answer...
  • Equipment Needed to Flat Tow 2022 Jeep Wrangler Unlimited Behind Motorhome
    I'd be happy to make some suggestions for you. To safely flat tow your Wrangler Unlimited, you'll need a tow bar, base plates, safety cables, a wiring solution to synch the Jeep taillights with those on the motorhome, a supplemental braking system and possibly a high/low adapter if the installed base plate height and the height of the hitch on the motorhome have a height difference of more than 3 inches. For a tow bar, I'd recommend the Roadmaster Falcon All-Terrain tow bar, part # RM-522....
    view full answer...


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Info for this part was:

Employee Andrew K
Video by:
Andrew K
Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee David F
Test Fit:
David F
Employee Bradley B
Test Fit:
Bradley B
Employee Mike S
Written by:
Mike S

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