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  1. Tow Bar Wiring
  2. Ram
  3. 2500
  4. 2021
  5. Demco
FITS 2021 Ram 2500
Demco 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Adapter Cord

Demco 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Adapter Cord

Item # DM9523010-54
Our Price: $271.23
Tow Bar Wiring
Confirmed to Fit
2021 Ram 2500

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Call etrailer.com at 1-800-940-8924 for expert service. We are your Ram tow bar wiring experts, and offer a great price. etrailer.com carries a complete line of Demco products for your Ram 2500 2021. Demco 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Adapter Cord part DM9523010-54 from Demco can be ordered online at etrailer.com. Complete tow bar wiring installation instructions and technical support.
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  • Reviews (55)
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2021 Ram 2500 - Demco 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Adapter Cord

  • Diode Kit
  • Splices into Vehicle Wiring
  • Tail Light Mount
  • Universal
  • Demco

This complete kit includes everything you need to correctly display your RV's brake and turn signals on your Ram 2500 tail lights. Includes coiled 7-way to 6-way cable and 6-way car-side socket.


Features:

  • Diodes display your RV's brake and turn signasl lights to your towed vehicle's lighting system
    • Wires towed car as a combined lighting system so that brake and turn signals travel along the same wire
    • Prevents feedback that can damage your vehicle's electrical components
    • Resists corrosion with heat-sealed casing
  • 7-Wire to 6-wire adapter cable lets you easily run power from your motorhome to your towed vehicle
    • Coiled to prevent dragging and tangling
    • Resistant to water, oil, and chemicals, with vinyl coating and silicone-injected plugs to prevent corrosion
  • 6-Way socket hardwires to towed car and mounts on the front bumper
  • Kit includes:
    • 4 Diodes
    • 4-Wire harness
    • 7-Way to 6-way adapter cord
    • 6-Way socket
    • Wire connectors
    • Cable ties
    • 1 Ring terminal
  • Made in the USA


Specs:

  • Wiring harness length: 26'
    • Wire gauge: 16
  • Adapter cord extended length: 7'
  • 1-Year warranty


Separate vs. Combined Lighting Systems

Combined vs Seperate Lighting System

This kit will display on your towed car as a combined lighting system - also known as a 2-wire system. A combined lighting system uses the same light bulb to signal both braking and turning (in other words, the car signals a turn by flashing the brake light, while a separate/3-wire system light up independently of each other. Add a wiring converter (118158 - sold separately) and 2 additional diodes to get a separate lighting system.


Do I Need a Brake Light Relay?

Because your vehicle has a combined lighting system - wherein the brake signals and the turn signals are carried on a single wire - a brake light relay (RM-88400 - sold separately) may be required if you use a supplemental braking system with your towing setup. A supplemental braking system depresses the brake pedal in your towed car every time you apply the brakes in your RV. So, if your towed car's brake lights illuminate when the brake pedal is pressed and the engine is off - as is the case when towing - then you need to install a relay to ensure that the lights on your towed car always act in accordance with the signals sent by your RV via the wiring harness. Without a relay, the brake signal from your towed car will override the turn signal sent by your RV when you slow down to make turns, creating a potential hazard.



9523010 Demco Tail Light Wiring Kit

9523054 Demco Trailer Connector Adapter - 7-Way to 6-Way - 7' Cord

Installation Details DM9523010-54 Installation instructions

Customer Satisfaction Score:


Customer Reviews

Demco 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Adapter Cord - DM9523010-54

Average Customer Rating:  4.8 out of 5 stars   (55 Customer Reviews)

This complete kit includes everything you need to correctly display your RV's brake and turn signals on your vehicle tail lights. Includes coiled 7-way to 6-way cable and 6-way car-side socket.

by:

etrailer was extremely helpful in getting me parts to flat tow our 2023 Jeep Wagoneer. More specifically, Noah took the time to research the required parts, offer technical guidance, and follow up to ensure I was taken care of. Top notch service which was much appreciated.



by:
2023 Jeep Wrangler Unlimited

Needed new wiring and diodes for my 2023 Jeep Rubicon. ETrailer makes it so easy to set up all the wiring for flat towing.



by:
Jeep Wrangler

This kit was fairly easy to install on a 2021 Jeep Wrangler. If you use this kit to set up a Roadmaster Nighthawk tow bar you do not need the 7-wire to 6-wire coil connector as the tow bar comes with it. Get a 4 diode wire kit without the coil connector and save money.



by:

Works great, to charge battery of toad you need to change the 12v power from center to match the towed vehicle or wire up towed car to center post 12v



by:

Took time to do the wiring, but once done it works great!



by:

EASY install and quick service

James

7/17/2021

Works great we use it at least monthly to pull our Jeep gladiator behind the RV no issues at all



by:
2017 Cadillac Escalade

Great products and quick delivery.



by:
Jeep Cherokee

The salesman was very helpful picking the correct setup for my Cherokee, easy to install, looks and works great



by:

Harry

2/19/2023

Great



by:

Works as advertised , however I feel the braking is more abrupt than gradual ..



by:

Works great 1 year and still working pe rfectly



by:

Works great, no issues



by:

Good quality.



by:

Exactly what I needed



by:

Work out excellent



by:

The parts came quickly and they were exactly as described



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excellent service



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by:

Very fast service!



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2020 Jeep Gladiator


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See what our Experts say about this Demco Tow Bar Wiring

  • Are There Replacement Baseplate Adapters Available For A Roadmaster Eagle 8000 Tow Bar
    I spoke with Roadmaster and unfortunately the Eagle 8000 tow bar has been discontinued for 15+ years so there are no longer any compatible replacements available for it. If you didn't want to have to purchase newer tow bar then you would need to use a Demco baseplate like the Demco Tabless Base Plate Kit # DM9519332. This baseplate will require you to trim/remove the lower active air shutters in order for it to fit, just like you would with any other baseplate.
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  • Where to Find Price of Demco Flat Towing Products
    The 9519336 is the same as the # DM9519336 and the 9599006 is the same as the # SM99251. The price for these and all of our products can be found on the product page. We do not carry the 9523157. If you want custom wiring you can use the Curt # C96JR or if you want to stick with Demco you can use the universal # DM9523010-54.
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  • Replacement Demco Coiled 7-Way To 6-Way Diode Wiring Kit Cable
    If you're just wanting the 7-wire to 6-wire cable from the Demco 4-Diode Universal Towed Vehicle Wiring Kit w/ 7-Wire to 6-Wire Coiled Connector # DM9523010-54 then you'll want part # DM9523054. This will also include another 6-way socket, which you can hang onto as a backup if you ever have an issue with your current one.
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  • Does Flat Towing 2016 Ram 1500 Require Brake Light Relay With Demco 7-Wire to 6-Wire Connector
    Your 2016 Ram 1500 will not require a brake light relay, the RV turn signals will not override the brake light when you are using the Demco 4-Diode Universal Towed Vehicle Wiring Kit with 7-Wire to 6-Wire Coiled Connector # DM9523010-54.
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  • Flat Tow Parts for 2021 Jeep Wrangler Using etrailer Invisible Base Plate Kit
    The etrailer Invisible Base Plate Kit with Removable Arms, # e98948 does not include safety chains. This is a custom-fit base plate that provides the needed attachment points for your tow bar. With this option, the tabs remain on tow bar arms and easily secure to base plate receivers with a quick turn. It is a simple, bolt-on installation with included hardware. For a complete flat tow kit for your 2021 Jeep Wrangler, you will also need the tow bar, safety chains, a wiring solution for...
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  • Recommended Flat Tow Setup for a 2014 Chevy Captiva Sport
    I can definitely help you out with parts to flat tow your 2014 Chevy Captiva Sport. I really like the Demco setup you were looking at because Demco offers a few kits that include just about everything that you need, plus they have very nice tow bars that will last you a long time which you can use on future vehicles you choose to flat tow. For a base plate kit use part # DM9518218 and the the Demco tow bar I recommend is the Dominator # DM9511008 because it has a 7,500 lb weight capacity...
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  • Can 2010 Jeep Grand Cherokee 4WD Quadra–Trac II be Flat Towed and Parts Needed
    I took a look at the online owner's manual for your 2010 Jeep Grand Cherokee, and under the "Recreational Towing" section your Quadra–Trac II model CAN be flat towed because it has a neutral transfer case, which is exactly what you described. If you go to page 340 (of the online manual, yours may be different) it explains exactly how to transfer into neutral, which you will do before towing. Since you mentioned Demco, here are all the parts you will need from Demco to flat tow your 2010...
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  • Does 2020 Buick Envision Need Brake Light Relay and Which is Easier Blue Ox or Roadmaster Setup
    Does our Allegro have trailer wiring already present at the rear of the vehicle? Like with a 7-way connector? If so the circuits are already combined regardless of what you see on the vehicle taillights. If you plan to use a diode kit or bulb and socket tow bar lighting solution you will need a brake light relay like # RM-88400 when using the brake system you mentioned so that the brake lights won't override the blinkers. It's a toss up on which is easier to use between the Roadmaster...
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  • 2018 Chevrolet Equinox Flat Tow Wiring Needs
    The Demco 4-Diode Universal Towed Vehicle Wiring Kit w/ 7-Wire to 6-Wire Coiled Connector # DM9523010-54 is going to allow you to run your vehicles existing 4 pole harness to the front to connect to your RV's tail, brake, and turn signal lights to your towed vehicle's lighting system. If you already have the wiring you need the Mighty Cord Trailer Connector Adapter - 4-Way Flat to 6-Way Round # A10-6034VP and the Hopkins Heavy-Duty, Coiled Trailer Connector Adapter - 7-Way to 6-Pole Round...
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  • Best Parts to Flat Tow 2021 Kia Soul With Manual Transmission
    There are a number of parts you will need in order to flat tow your 2021 Kia Soul with a manual transmission, and I'll be happy to recommend the best parts that are the easiest to use for you. The best parts for you are the following: - Base Plate Kit: Blue Ox Base Plate Kit # BX2727 - Tow Bar: Blue Ox Alpha 2 Tow Bar # BX7380 - Wiring Kit: Demco 4-Diode Universal Towed Vehicle Wiring Kit with 7-Wire to 6-Wire Coiled Connector # DM9523010-54 - Supplemental Braking System: Demco SBS Stay-IN-Play...
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  • Tow Bar and Flat Tow Parts Needed for Heavy 2020 Ram 3500
    We can definitely get you a flat tow set up for your 2020 Ram 3500. These trucks are heavy, but the GVWR you are referring to is the gross weight, which is the max weight it can be when loaded with passengers and cargo. According to my research, a 2020 Ram 3500 has a curb weight (unloaded) of up to just over 7,500 lbs max. So even if you have some cargo in the truck, it is difficult to imagine you will be exceeding the 10,500 lb tow bar option you can use with a 2 inch hitch on your motorhome,...
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    Image 1 for
  • Using Demco Aluminator Tow Bar With Roadmaster EZ Base Plates on 2008 Toyota Yaris
    Your Demco Aluminator tow bar is compatible with the Roadmaster EZ Base Plate Kit # 521181-1 that fits your 2008 Toyota Yaris, you will simply need an adapter, the Roadmaster Tow Bar Adapter # RM-032. As for the other parts needed to flat tow your 2008 Toyota Yaris with a Demco Aluminator tow bar, here is a list of everything you will need, and I'll include the base plates and adapter. - Base Plate Kit: Roadmaster EZ Base Plate Kit # 521181-1 - Roadmaster Tow Bar Adapter # RM-032 - Safety...
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  • Difference Between Blue Ox and Demco Wiring Kit for Flat Towing 2019 Jeep Wrangler
    There is really only one difference between the Demco 4-Diode Universal Towed Vehicle Wiring Kit with 7-Wire to 6-Wire Coiled Connector # DM9523010-54 and the Blue Ox Tow Bar Wiring Kit # BX8848, which is that the Demco comes with the 7-Wire to 6-Wire cord as well as a vehicle-side 6-way while the Blue Ox kit requires those be purchased separately. So if you were to go with the Blue Ox Tow Bar Wiring Kit # BX8848 you would also need the Blue Ox 7-Wire to 6-Wire, Coiled Electrical Cord...
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  • Troubleshooting A Non-Working Light Function With Diode Wiring
    Since the diodes in the Demco 4-Diode Universal Towed Vehicle Wiring Kit w/ 7-Wire to 6-Wire Coiled Connector # DM9523010-54 use spade terminal connectors the easiest way to test the diode would be to swap the connections on the diode in question and test your light functions to see if the terminal on the diode is the issue. If it randomly stopped working then the cause is typically just a loose connection or a bad ground so I would check the connections and make sure there's no damage...
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  • Recommended Flat Towing Wiring Harness for a 2023 Ford F-150 w/ LED Lights
    No, it will not. Since your 2023 Ford F-150 has LED tail lights you will need the Roadmaster Smart Diode 7-Wire to 6-Wire Wiring Kit for Variable Voltage LED Tail Lights item # RM38FR. The issue is that the brake and running lights will all be the same brightness with the standard diodes included in the Demco item # DM9523010-54. The diodes in the Roadmaster item # RM38FR kit convert the 12V signal from your RV's wiring to a 9V signal which allows the differentiating brightness needed between...
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  • Parts Needed to Flat Tow 2021 Ram 1500 Classic Warlock
    We do indeed have the parts needed for you to flat tow your 2021 Ram 1500 Classic Warlock, which I'll go ahead and list out for you: - Base Plate Kit: Blue Ox Base Plate Kit # BLU74FR - Tow Bar: Blue Ox Avail Non-Binding Tow Bar # BX7420 - Wiring Kit: Demco 4-Diode Universal Towed Vehicle Wiring Kit # DM9523010-54 - Supplemental Braking System: Demco SBS Stay-IN-Play DUO Supplemental Braking System # DM86VR I verified with Blue Ox for you that the base plates do fit your 2021 Ram 1500...
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  • Blue Ox Base Plates & Parts to Flat Tow 2021 Ford F-250 Super Duty
    We have you covered with all the parts you'll need to flat tow your 2021 Ford F-250 Super Duty, including the Blue Ox base plates. These are a really nice choice because there isn't any part of the base plate showing except for the tabs, which are removable when you aren't flat towing your truck, which ensures it keeps it's aesthetic. The list of all the parts you need to flat tow your 2021 F-250, including the base plates, is the following: - Base Plate Kit: Rodmaster Direct Connect...
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  • Can I Flat Tow a 2021 Jeep Wrangler with a Smittybilt SRC Front bumper?
    The Smittybilt SRC Front bumper on the 2021 Jeep Wrangler has 3/4" thick d-rings so you can use the Adapter for Jeep D-Ring Bumper Mounts to Roadmaster Motor Home Mount Tow Bars Item # RM-035 to tow with the D-rings on your bumper. To flat tow your 2021 Jeep Wrangler you will also need, a tow bar, safety cables, supplemental braking system, wiring and possibly a high low adapter. Tow Bar- Roadmaster BlackHawk 2 All Terrain, Non-Binding Tow Bar item # RM-422 Safety Cables- RoadMaster...
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  • Recommended Flat Towing Set Up for a 2024 Buick Encore GX
    Yes, it will. The Roadmaster Battery Disconnect with Switch for Towed Vehicle w/ Flat Tow Brake System item # RM-766 is not only compatible with your 2024 Buick Encore GX but it is recommended to be used by Roadmaster. This a great part that makes disconnecting and reconnecting your battery extremely simple. Here are some other parts you will need to flat tow your 2024 Buick Encore GX: Tow Bar and Safety Chains - Blue Ox Alpha 2 Non-Binding Tow Bar 2" Hitch - 6,500 lbs item # BX7380 Base...
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  • How To Install Tow Bar Wiring On Vehicle With Separate Brake Signal And Turn Signals
    When installing tow bar wiring on a vehicle with separate brake and turn signals that will be flat towed you would want to use a diode kit like the Demco 4-Diode Universal Towed Vehicle Wiring Kit w/ 7-Wire to 6-Wire Coiled Connector # DM9523010-54. When installed it will make your brake lights flash as the turn signals instead of your actual amber turn signals when being flat towed. If you wanted to keep the separate wiring for flat towing you would need the Vehicle to Vehicle Tail Light...
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  • Can You Order Just 7-way to 6-way Cord From Demco Diode Kit DM9523010-54?
    Yes we sell just the 7-way to 6-way cord included in the Demco # DM9523010-54 you were looking at without getting the diodes. You'll need # DM9523054, though it will come with a new 6-way plug that you can keep as a spare. There's no way to order it without that plug as well.
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  • Parts Needed to Flat-Tow a 2002 Jeep Liberty
    In order to flat-tow a 2002 Jeep Liberty you'll need a few different items such as a base plate kit, tow bar, safety cables, lighting harness, and supplemental braking system. I have attached a list with each of these parts for you below. etrailer Classic Base Plate Kit part # e98970 etrailer XHD Non-Binding Tow Bar part # e94ZR Demco 4-Diode Universal Towed Vehicle Wiring Kit part # DM9523010-54 Brake Buddy Select 3 Portable Supplemental Braking System part # HM39524 This is a complete...
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  • Recommended Tow Dolly For A 2010 Ford Ranger
    The online manual for a 2010 Ford Ranger doesn't list anything about dolly towing the vehicle but does state that manual transmissions can be placed in 2WD and flat towed, so you're more than likely fine to dolly tow your Ranger, but I recommend double-checking with your local Ford dealership to ensure there isn't anything else that would prevent you from doing so. If you haven't purchased your tow dolly yet then I recommend the Demco Kar Kaddy X Tow Dolly w/ Disc Brakes # DM9713093....
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    Yes, a 2016 Ford Explorer (4WD) can be flat-towed with all four wheels down so long as it has the 3.5L V6 or 3.5L EcoBoost V6 Engine. That said, there are no modification needed for this unless a specific flat-tow part you are looking at requires this. I have attached some parts for you below as well that you will need. Demco Tabless Base Plate Kit part # DM9519329 (Clean Look) Demco Dominator Non-Binding Tow Bar part # DM9511008 (Easiest To Use) Demco 4-Diode Universal Towed Vehicle Wiring...
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