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Roadmaster Universal Wiring Kit with Smart Diodes for Variable Voltage Incandescent Tail Lights

Roadmaster Universal Wiring Kit with Smart Diodes for Variable Voltage Incandescent Tail Lights

Item # RO94FR
Retail:$151.24
Our Price: $133.77
You Save: $17.47
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. Great Prices for the best tow bar wiring from Roadmaster. Roadmaster Universal Wiring Kit with Smart Diodes for Variable Voltage Incandescent Tail Lights part number RO94FR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (51)
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Roadmaster Tow Bar Wiring - RO94FR

  • Diode Kit
  • Splices into Vehicle Wiring
  • Universal
  • Roadmaster

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, incandescent 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 incandescent lights only. If your vehicle has LEDs, you'll need to use the smart diode kit designed for LED tail lights (RO44FR - 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


153782 Roadmaster Wiring Kit with Smart Diodes for Variable Volt and Incandescent Bulbs

Installation Details RO94FR Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

Roadmaster Universal Wiring Kit with Smart Diodes for Variable Voltage Incandescent Tail Lights - RO94FR

Average Customer Rating:  4.7 out of 5 stars   (49 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:

Extremely impressed I ordered a wiring harness on a Thursday afternoon expecting it it be delivered on Monday we had changed our travel plans to delay our departure untilTuesday However almost miraculously the part was delivered by 8 am the next morning allowing it to be installed the same day I could not believe it and am extremely impressed at their efficiency



by:
Chevrolet TrailBlazer

Smart diodes worked well with my 2023 Chevy Trailblazer. Only two diodes required vs. four that were required in my previous setup on an different vehicle.



by:
Chevrolet Equinox

This kit worked out great for my 2022 Chevy Equinox. I like how it has separate side plates, which make it easier to attach the main bar. The points where it attaches to the frame seem plenty secure. It is important to watch the videos provided by etrailer as Ryan is very thorough and has good tips for installing. I would also recommend installing additional wiring while having the front end off. Overall, I was able to complete in my driveway. The hardest part was sorting out the wiring for whatever braking and tail lights you decide on. William S helped me pick all the necessary components needed for flat towing behind my Jayco RV. I am looking forward to a summer of camping and having more freedom to explore the area, now having a car.



by:

Got here in good shape and on time

William

12/29/2023

Worked great boots wore out to soon

Etrailer Expert

Mike L.

12/29/2023

@William Boots? Can you clarify that for us?


by:

Videos and packaging make this much easier than I thiught



by: 02/14/2023
2021 Chevrolet Spark

Installation is Easy & Clear. The most challenging part is getting the Fascia Quarter panels to separate from the clips. I found that there is an additional identical screw a little deeper behind the one that is instructed to remove. If both screws are removed - fascia doesn't have to be tugged on and it easily releases itself without breaking any clips. The Safety Cables are not easily routed away from the belt on the passenger side but there are three factory holes in the body that they can be secured to help keep clear from the belt.



by:

What is there to say except it works and works well!



by:

Video explained well how to install. Very happy with install. Works!



by:

Video (2020 Equinox) easy to follow. Passenger side wiring was TIGHT after making the butt connection from the light wiring TO the diode pack. I suggest adding additional wiring to this junction before connecting to the diode pack. Good use of GREEN wiring in kit, pay attention to video.



by:

It was professional installed. It works as describe no issues

John B.

1/19/2023

Same as my first review: It was professional installed. It works as describe no issues



by:

good product



by:
Chevrolet Spark

Nice wiring kit. Running the wire through the Chevy Spark took a bit of time, but it works nicely.



by:

Everything you need in one package. The service is OUTSTANDING.



by:

I installs this in a couple of hours. Your videos are great help in making installing easier.



by:

Very fast and free shipping.



by:

Very good installation it does an awesome job



by:

Easy to install. Works great.



by:

very nice unit. Easy to install and top quality product



by:

Easy install, even easier to hookup, and looks great when not in use / barely know it's there.



by:

The sales and support folks where very knowledgeable. They were very helpful getting the parts I needed and shipped very quickly. I would recommend them and will be using them again in the future. Thanks again.



by:



by:



by:

Haven’t installed yet, did appreciate the quick arrival of the ordered items.



by:



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Show More Reviews

See what our Experts say about this Roadmaster Tow Bar Wiring

  • 3rd Brake Light for 2021 Chevrolet Equinox
    You've not wired anything wrong, the Roadmaster Universal Wiring Kit,, # RO94FR like most all kits, is not setup to support the third brake light. To do so would require additional wiring and diodes and since the third brake light is not required by law, it is not supported. You are good-to-go and ready to tow.
    view full answer...
  • Does Roadmaster Universal Wiring Kit with Smart Diodes RO94FR Activate Tail Lights
    Yes, tail lights that are activated at night will indeed work with the Roadmaster Universal Wiring Kit with Smart Diodes for Variable Voltage Incandescent Tail Lights # RO94FR.
    view full answer...
  • Does Roadmaster Smart Diode Kit Fit 2023 Chevy Equinox RS
    I checked directly with Roadmaster just now and for the 2023 Chevy Equinox RS you do need to use the smart diode kit part # RO94FR on your RS model.
    view full answer...
  • Correct Flat Tow Wiring Harness Didoes for 2022 Ford F-150
    The 2022 Ford F-150 (Non-Hybrid) requires special diodes for the flat-tow wiring harness. If you're not using these special diodes then you could run into issues like you described. The correct ones for this vehicle are the Roadmaster Universal Wiring Kit with Smart Diodes; part # RO44FR for vehicles with LEDs or part # RO94FR for vehicles with incandescent. If you are using smart diodes already please let me know and I would be glad to see if I can assist further another way.
    view full answer...
  • Install Instructions to Use When Installing Roadmaster Brake Lite Relay in 2020 Ford F-150
    Yes you can use 2018 Ford F-150 Brake Lite Relay part # RM-88400 video as a guide for your 2020 Ford F-150. The second set of instructions "normally closed" would be what you'd use since your truck has neutral tow and a push button start.
    view full answer...
  • What Type of Diode Tow Bar Lighting Kit is Needed for 2018 Chevy Equinox
    You are correct. Your 2018 Chevy Equinox does require the smart diode style of Roadmaster tow bar wiring part # RO94FR as the standard style in the # RM-15267 would not work. I attached an install video for this kit on a similar 2019 Chevy Equinox as yours for you to check out as well.
    view full answer...
  • Tow Bar Wiring For 2022 Chevy Spark For Use With Brake Buddy Stealth Braking System
    The part you mentioned is a wiring kit for a trailer connector, and won't give you the necessary compatible connections at the front of your 2022 Chevy Spark to work with the Brake Buddy Stealth Supplemental Braking System # HM39530. In fact, since your '22 Spark uses variable voltage tail lights (where all of the signals are sent down a single wire), you'll need a specific tow bar wiring kit, the Roadmaster Universal Wiring Kit with Smart Diodes for Variable Voltage Incandescent Tail...
    view full answer...
  • Recommended Tow Bar Wiring Kit For 2023 Ford Bronco
    We have just the thing! Most of the 2023 Bronco models will require use of a smart diode. It depends on what lighting system your Bronco has. If your vehicle has the variable voltage LED lighting you will want the # RO44FR. If it has incandescent lighting you will need the # RO94FR. The type of lighting will be specified in your owners manual. The Bronco LED lights look very different from the incandescent. The LEDs will have a clear lens with red behind, while the incandescent has a red/white...
    view full answer...
  • Diode Wiring Needed To Flat Tow A 2023 Chevy Equinox LT
    A 2023 Chevy Equinox LT requires smart diodes so you would need the Roadmaster Universal Wiring Kit with Smart Diodes for Variable Voltage LED Tail Lights # RO44FR if you have LED tail lights or the Roadmaster Universal Wiring Kit with Smart Diodes for Variable Voltage Incandescent Tail Lights # RO94FR if you have incandescent tail lights. If you don't have the 6-pole socket then you'll also want part # RM-910030-7 as well.
    view full answer...
  • Availability Of Smart Diode Kit For A 2023 Chevy Equinox
    Indeed you will need the Smart Diode Kit for your 2023 Chevy Equinox with LED lights. We carry them here at etrailer and we are able to ship to you in Canada. We have part # RM26FR for the complete kit, of we have # RO94FR if you need the diodes and wire only.
    view full answer...
  • Correct Wiring Kit for Flat Towing 2018 Chevrolet Malibu
    The wiring kit you need in order to flat tow your 2018 Chevrolet Malibu is the Roadmaster Universal Wiring Kit with Smart Diodes for Variable Voltage Incandescent Tail Lights # RO94FR. Since this does not come with a connector you can use the RoadMaster 6-Wire Trailer Connector - Vehicle End # RM-910030-7. Be sure to consult your vehicle owners manual for specific information on flat towing the vehicle. I have attached some installation videos for your reference.
    view full answer...
  • Correct Roadmaster Universal Diode Wiring Kit for a 2019 Chevrolet Equinox
    The correct Roadmaster Universal Diode Wiring Kit for a 2019 Chevrolet Equinox is part # RM-154 for Premier models or part # RO94FR for all of other models. The diodes can be purchased separately for each, part # RM-794 for Hy-Power or part # RO34FR for Smart.
    view full answer...
  • Tow Bar Wiring For A 2021 Ford F-150 With Incandescent & LED Taillights
    The best way you can determine if your 2021 Ford F-150 has LED or Incandescent lights is to call the dealer with your VIN number and they should be able to tell you. If your vehicle has LED lights, you can use the Roadmaster Universal Wiring Kit with Smart Diodes for Variable Voltage LED Tail Lights # RO44FR. Or If your vehicle has incandescent lights, you can use the Roadmaster Universal Wiring Kit with Smart Diodes for Variable Voltage Incandescent Tail Lights # RO94FR. You will also...
    view full answer...
  • Recommended Compatible Wiring Tow Bar Wiring Harness For A 2018 Chevy Equinox
    Hopkins manufacturing doesn't currently have a compatible wiring harness for your 2018 Chevy Equinox so instead I recommend the Roadmaster Universal Hy-Power Diode Wiring Kit Item # RM-154 if you have the Premier edition or the Roadmaster Universal Wiring Kit with Smart Diodes Item # RO94FR if you do not have the Premier edition. Both of these kits are a one time install that will require you to splice into your vehicle's wiring and will allow your RV's stop and turn signals to also display...
    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...
    Image 1 for
  • 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...
  • Can 2019 Chevy Sonic RS be Flat Towed
    Yes your 2019 Chevy Sonic turbo can be flat towed with the Blue Ox base plate kit part # BX1703. In addition to the base plates, you will also need a compatible tow bar, safety cables, lighting, and supplemental braking to flat tow your vehicle. The most popular compatible tow bar is the Blue Ox # BX7420. This has non-binding arms which makes the setup very easy to connect/disconnect. For lighting you'd want the part # RO94FR. The diode kit that comes with this allows you to splice into...
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  • Parts Needed to Flat Tow 2021 Ford F-150
    The best flat tow set-up for a 2021 Ford F-150 is as follows: - Base Plates, Roadmaster Direct-Connect Base Plate Kit, # RM38VR - Tow Bar, Roadmaster Nighthawk All Terrain, # RM-676 (includes the needed safety cables) - Wiring for Indicator Lights, Roadmaster Universal Wiring Kit, # RO44FR - Supplemental Braking System, Blue Ox Patriot Portable Braking System, # BLU37TR along with, Brake-Lite Relay, # RM-88400 and Battery Charge Line Kit, # RM-156-25 The Roadmaster Direct-Connect Base...
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  • Flat Tow Wiring Kit For 2022 Chevy Tahoe Premier
    There is a flat tow wiring kit for your 2022 Chevy Tahoe Premier (which is what I think you meant as there isn't a Premium), but the Hopkins # HM56115 does not fit the Premier models. Your '22 Tahoe has variable voltage taillights, which means multiple electrical signals are on a single wire, so it needs a specific wiring kit: - Roadmaster Universal Wiring Kit with Smart Diodes for Variable Voltage Incandescent Tail Lights # RO94FR The # RO94FR moderates the voltage correctly so that...
    view full answer...
  • What Parts do I Need to Flat-Tow My Manual 2021 Chevy Spark LT when Using the Nighthawk # RM-676?
    In order to use the Roadmaster Nighthawk Tow Bar # RM-676 on your 2021 Chevy Spark LT with manual transmission without ACTIV, I recommend the following parts: - Roadmaster Direct-Connect Base Plate Kit - Removable Arms # RM-523202-5 - Blue Ox Patriot Portable Braking System # BLU37TR (required by law in most states) - Roadmaster Universal Wiring Kit with Smart Diodes for Variable Voltage Incandescent Tail Lights # RO94FR You will not need safety cables and tow bar wiring since the Nighthawk...
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  • Parts Needed to Flat Tow 2022 Ford F-150 Hybrid 4x4
    Yes, your 2022 Ford F-150 hybrid with 4-wheel drive can indeed be flat towed, and in order to do so you'll need a number of parts, which I'll go ahead and list for you. - Base Plate Kit: Roadmaster Direct-Connect Base Plate Kit # RM38VR - Tow Bar: Roadmaster Nighthawk All Terrain, Non-Binding Tow Bar # RM-676 - Wiring Kit - Incandescent Tail Lights: Roadmaster Universal Wiring Kit with Smart Diodes # RO94FR or - Wiring Kit - LED Tail Lights: Roadmaster Universal Wiring Kit with Smart...
    view full answer...
  • All Parts Needed to Flat Tow 2023 Chevy Equinox
    We can definitely get your 2023 Chevy Equinox set up to be flat towed, and there are a number of parts you will need, so I'll go ahead and list them out for you like you wanted to make it easy to order: - Base Plate Kit: Roadmaster Direct-Connect Base Plate Kit # RM-523193-5 - Tow Bar: Roadmaster Nighthawk All Terrain, Non-Binding Tow Bar # RM-676 - Wiring Kit - LED Tail Lights: Roadmaster Universal Wiring Kit with Smart Diodes # RO44FR OR - Wiring Kit - Incandescent Tail Lights: Roadmaster...
    view full answer...
  • Compatible Base Plate For A 2021 Chevy TrailBlazer Activ AWD
    If your 2021 Chevy TrailBlazer Activ AWD has a 1.3L Turbo engine then you will be able to use the Roadmaster Direct-Connect Base Plate Kit - Removable Arms # RM35FR. The RS base plates would not be compatible with your vehicle. As for the difference between Roadmaster and Blue Ox, Roadmaster manufactures all of their equipment in house, in the US, and is top tier in quality. While Blue Ox is a good brand, their quality and customer service comes in second place. Roadmaster's tech service,...
    view full answer...
  • Can I Flat Tow a 2020 Chevy Sonic LT with Automatic Transmission and What Parts Do I Need
    From what I was able to find in the owner's manual for the 2020 Chevy Sonic LT, it does appear that this vehicle can be flat towed; there is a note that explains the following procedure for the models with an automatic transmission: "When dinghy towing a vehicle with an automatic transmission, the vehicle should be run at the beginning of each day and at each RV fuel stop for about five minutes. This will ensure proper lubrication of transmission components"- As long as these procedures...
    view full answer...

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
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Jacob T
Employee Dustin K
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Dustin K
Employee Chris R
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Chris R
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Employee Mike S
Written by:
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Employee Michael B
Installed by:
Michael B

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