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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: $143.79
You Save: $7.45
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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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   (53 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:
2016 Volkswagen GTI

Installed on my MK7 VW GTI that I tow behind my coach. Took about 2 hours and worked as expected. The instructions are comprehensive but easy to follow.



by:

Good advise, Ordered...delivered on time..the best



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:

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:
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:

Very helpful, diligent, and kind. Thank you.



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:

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:

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:

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 good installation it does an awesome job



by:

Very fast and free shipping.



by:

Easy to install. Works great.



by:

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



by:

very nice unit. Easy to install and top quality product



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:

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



by:


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Show More Reviews

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