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  1. Flat Tow Wiring Harness
  2. Toyota
  3. Tacoma
  4. 2015
  5. Demco
FITS 2015 Toyota Tacoma
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: $247.29
Flat Tow Wiring Harness
Confirmed to Fit
2015 Toyota Tacoma

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The best technical support and full flat tow wiring harness installation instructions. Great price Tacoma flat tow wiring harness and expert service. Toyota Tacoma, 2015 flat tow wiring harness by Demco are available from etrailer.com. For expert service call 1-800-940-8924 to order your Demco 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Adapter Cord part number DM9523010-54, or order online at etrailer.com.
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  • Reviews (55)
  • Q & A (0)
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2015 Toyota Tacoma - 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
  • Demco
  • Universal

This complete kit includes everything you need to correctly display your RV's brake and turn signals on your Jeep Grand Cherokee 4xe 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 Toyota Tacoma'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 Toyota Tacoma'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 Toyota Tacoma
    • 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 Toyota Tacoma 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:

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:

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



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:
2017 Cadillac Escalade

Great products and quick delivery.



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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Very fast service!



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2020 Jeep Gladiator


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55
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See what our Experts say about this Demco Flat Tow Wiring Harness

  • 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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  • Best Flt Tow Wiring Kit for a 2023 Ford F-150 Hybrid with LED Lights
    Since your 2023 Ford F-150 has the LED lights I highly recommend the Roadmaster Smart Diode 7-Wire to 6-Wire Wiring Kit # RM38FR which has better diodes to make it compatible with the LED lights. The Demco Kit # DM9523010-54 has some really basic diodes which is why I recommend the Roadmaster over this. Demco doesn't list out fitment with LED lights but Roadmaster has a few diode kits and they say this newer one needs to be used for your truck. You'll also need the Charge Line Kit # RM-156-25...
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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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  • 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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  • 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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  • 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 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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  • 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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  • 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...
    view full answer...
  • 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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  • 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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  • Flat Towing Wiring For A 2017 Kia Soul
    My recommendation is to use a 4-diode universal towed vehicle wiring kit like # DM9523010-54. What this does is easily allows you to connect your RV's tail, brake, and turn signal 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. This kit also includes a 6 way to 7 way coiled cord that will connect to your motorhome and your Kia Soul as well as, all the necessary hardware to install. You...
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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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  • Roadmaster Crossbar-Style Vs. Direct-Connect Base Plate Kits for 2021 Jeep Wrangler Unlimited
    The biggest difference between the Roadmaster Crossbar-Style Base Plate Kit # RM-521453-4 and the Roadmaster Direct-Connect Base Plate Kit # RM-521453-5 for your 2021 Jeep Wrangler Unlimited is going to be the style of tow bar that you can use. The Crossbar-Style Base Plate Kit # RM-521453-4 will allow you to use a tow bar like the etrailer SD Non-Binding Tow Bar for Roadmaster Crossbar-Style Base Plates # e44ZR. The Direct-Connect Base Plate Kit # RM-521453-5 will allow you to use a tow...
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  • Recommended Flat Towing Equipment For A 2021 Jeep Wrangler Sahara 4XE
    If you went with the etrailer Invisible Base Plate Kit - Removable Arms Item # e98948 you would need to also get an adapter so I recommend the Roadmaster Direct-Connect Base Plate Kit - Removable Arms Item # RM-521453-5 instead. The Blue Ox Patriot Portable Braking System - Proportional Item # BLU37TR will work with your Jeep and I recommend installing the 12 Volt Outlet Kit, 20 amps Item # RM-9332 to have a dedicated 12v outlet to power it. The Demco 4-Diode Universal Towed Vehicle...
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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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  • Is the Demco 4-Diode Universal Towed Vehicle Wiring Kit Offered Without 7 to 6-Way Cord
    Yes, the Demco 4-Diode Universal Towed Vehicle Wiring Kit w/ 7-Wire to 6-Wire Coiled Connector part # DM9523010-54 is available without the umbilical cord using the Demco 4-Diode Universal Towed Vehicle Wiring Kit part # DM9523010. If you need the 6-pole as well you can get this with part # PK11609.
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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
  • Parts Needed For Flat Towing a 2024 Chevrolet Trax
    So currently(6/11/24), the only custom fit base plate I see available for your 2024 Chevrolet Trax is the Demco # DM59YV. Not sure if this is what you meant you have. If you can verify this and which non-binding tow bar you have I can verify if you will need any type of adapter. As for the Demco Stay-IN-Play Duo Braking System # DM86VR you will want to make sure you have a Charge Line # RM-156-25 to prevent the battery on your Trax from being drained. You will also need the Wiring # DM9523010-54...
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  • Tow Bar Lighting Kit That Fits 2018 Ford Edge
    The Hopkins Tow Bar Lighting Kit part # HM56011 is a confirmed fit for the Sport and Titanium models of your 2018 Ford Edge but not the other models. If you have one of the other models you'd need a diode kit like the part # DM9523010-54. For your tow vehicle that does not have air brakes the DUO part # SM99251 that you mentioned would be a great option. Our installers prefer this system to all of the other permanent install options because of how well it works and how much easier it...
    view full answer...
  • How To Determine If I Need To Install A Brake Light Relay On My Towed Vehicle
    It depends on whether or not the towed vehicle's brake lights illuminate when the brake pedal is pushed when the vehicle is being towed. If yes, then you'll need to install a brake light relay with # RM-88400; that way your vehicle will act in accordance with the signals sent by your RV.
    view full answer...
  • Best Way To Flat Tow A 2021 Jeep Wrangler Unlimited
    I suggest getting the etrailer Invisible Base Plate Kit # e98948 for your 2021 Jeep Wrangler Unlimited. This comes with everything you need to get it installed. To get your Jeep ready for the flat tow, I suggest getting the Blue Ox Altha 2 Tow Bar # BX7380, a portable braking system # BLU37TR and wiring # DM9523010-54 to complete your setup.
    view full answer...
  • Parts Needed to Flat Tow a 2021 Jeep Cherokee
    For your 2021 Jeep Cherokee you will at minimum need base plates, a tow bar, safety cables, a wiring solution to display your indicator lights from the RV to the Jeep, and a braking solution/supplemental braking for the Jeep. I recommend the Demco Tabless Base Plate Kit, # DM9519307 that will match perfectly with the Demco Dominator Non-Binding Tow Bar, # DM9511008 you have been looking at. This also includes the needed safety cables. For the wiring, I suggest the Demco 4-Diode Universal...
    view full answer...
  • 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...
    view full answer...


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