Roadmaster Diode 7-Wire to 4-Wire Flexo-Coil Wiring Kit
Item # RM-15247
Our Price: $242.88
Confirmed to Fit
2004 Acura TL
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2004 Acura TL - Roadmaster Diode 7-Wire to 4-Wire Flexo-Coil Wiring Kit
- Diode Kit
- Splices into Vehicle Wiring
- Universal
- Tail Light Mount
- Roadmaster
Diode kit allows you to use your Acura TL's tail lights and wiring system while preventing feedback from your RV. Wires 2-wire and 3-wire systems to operate as a combined lighting systems. Includes 7-wire to 4-wire Flexo-Coil electrical cord.
Features:
- Lets you wire your vehicle to accept your RV's tail, brake, and turn signal lights for flat towing
- Wires towed car as combined system so that brake and turn signals travel along same wire
- Prevents electrical feedback and the damage it can cause to your vehicle's electrical components
- Diodes powder coated aluminum case is corrosion resistant and provides protection from the elements
- Brake light relay (RM-88400 - sold separately) may be required if used with supplemental braking system
- Flexo-Coil cord is resitant to water, oil, chemicals, and has silicone-injected plugs to prevent corrosion
- Includes: 4 Hy-Power diodes; 30' long, 4-wire harness; wire connectors; cable ties; 1 ring terminal; 3' long plastic loom, 8 ft coiled cord, vehicle mounting bracket, and socket
- Made in the USA
- Limited Lifetime Warranty
Specs:
- Diode Max amperage: 85 amps
- Diode Max voltage: 24 volts
- Coiled cord max length: 8'
- Coiled cord retracted length: 15"
Note: For applications that have separate lighting, this kit will cause your brake lights to function as both brake and turn signal lights. A wiring converter (118158 - sold separately) and 2 additional diodes (RM-792) will be needed if you want to retain separate turn and brake signals.
Separate vs. Combined Lighting Systems
Some automobiles operate on a 3-wire system, wherein the brake signal and the turn signals travel along different wires to illuminate different lights. (Typically, these vehicles have amber turn signals.) This is referred to as a "separate lighting system". When you hook up for flat towing using this kit, your towed car's lighting system will operate in a combined fashion regardless of whether it typically has combined or separate lighting. This means that the brake and turn signals sent by your RV to your towed car will be carried on a single wire. As a result, your car's brake lights will do the flashing for the turn signals. Your vehicle will still function as designed when not hooked up to your RV.
Do You Need a Brake Light Relay?
Because this kit wires your vehicle as a combined system, 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.
15247 Road Master Towed Car 4 Diodes RV Plug to 4-Wire Socket Flexo Coil Wiring Kit
Installation Details
Customer Satisfaction Score:
93% were satisfied with this product
7% of customers were not satisfied
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Customer Reviews
Roadmaster Diode 7-Wire to 4-Wire Flexo-Coil Wiring Kit - RM-15247
Average Customer Rating: 4.8 out of 5 stars (112 Customer Reviews)
Diode kit allows you to use your vehicle's tail lights and wiring system while preventing feedback from your RV. Wires 2-wire and 3-wire systems to operate as a combined lighting systems. Includes 7-wire to 4-wire Flexo-Coil electrical cord.by: Richard C07/29/2022
It would have been 5 stars but the battery charge kit would not work with the 7 wire to 4 wire flexo coil kit, so I had to put together my own 7 wire to 6 wire harness to make things work.
Comments
I am glad that you were able to make it work. Since the 7 to 4 way Flexo coil kit comes with the 4 round plug it does not have enough connectors to attach the charge line kit to it. As you mentioned, you would need a 7 to 6 connector to allow it to work. You could go with part # RM-152-98146-7
Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Wire to 6-Wire Straight Cord
$198.88 which is a straight line kit or part # RM-152-1676-7
Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Wire Hybrid Cord
$195.60 which is a hybrid straight line and coil kit. Since you already have part # RM-15247
Roadmaster Diode 7-Wire to 4-Wire Flexo-Coil Wiring Kit
$242.88 then you can simply replace the 4 round connector to a six round connector with part # RM-910030-7
RoadMaster 6-Wire Trailer Connector - Vehicle End
$31.10 or part # RM-910030-5
Roadmaster Bent Electrical Socket Bracket
$23.49.
-- Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Wire to 6-Wire Straight Cord
$198.88 which is a straight line kit or part # RM-152-1676-7
Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Wire Hybrid Cord
$195.60 which is a hybrid straight line and coil kit. Since you already have part # RM-15247
Roadmaster Diode 7-Wire to 4-Wire Flexo-Coil Wiring Kit
$242.88 then you can simply replace the 4 round connector to a six round connector with part # RM-910030-7
RoadMaster 6-Wire Trailer Connector - Vehicle End
$31.10 or part # RM-910030-5
Roadmaster Bent Electrical Socket Bracket
$23.49.
Jenny N - 08/05/2022
by: Tim Dahl, Pahrump, Nv.04/24/2022
Ford Ranger
Perfect Fit. I watched the video's that etrailer provides and decided to take on the install myself. Everything from the base plates, diode wiring kit, drop receiver and Blue Ox Tow bar went just as the video's showed.
We are very happy with the service and parts etrailer.com has provided us for our 2022 Ford Ranger.
by: Everything You Need05/18/2022
1995 Jeep YJ
I installed this on my 1995 Jeep YJ. After watching the video a couple of times, to get an idea of what I was getting myself into, this job was fairly simple. It took me about 4 hours total time, and when I plugged the wiring harness into my truck and all the brake & taillights worked perfectly on the Jeep.
by: Bill12/23/2022
Very easy to install and love that it doesn't interfere with our vehicle's lighting system. Was even easier to do the installation since etrailer has a step-by-step video for our vehicle year and model.
by: Gregory 09/06/2022
I installed this myself along with a tow bar from another company at the same time, in about 4 hours. installation was straightforward and worked perfectly. saved about $800 in total labor.
by: George05/03/2022
Removed the wiring after the main computer module on the car failed shortly after installing it. Coincidence? Maybe. But I wasn’t going to take any chances.
Comments
I have gotten in touch with the manufacturer and they have said that the complication could be from not installing the diodes correctly. Did you use a brake light switch kit? If not, then the Roadmaster Diode 7-wire to 4-wire Flexo-coil Wiring kit will not work properly. If you do not have a brake light switch, then we recommend using a custom fit brake light switch # RM-751455
Roadmaster Stop Light Switch Kit - Fiat
$43.03.
-- Roadmaster Stop Light Switch Kit - Fiat
$43.03.
Katrina B - 05/27/2022by: Robert10/19/2021
Little pricey for what you get. Needed to buy additional wiring to complete. The wiring that comes in the kit is no long enough to run from the tail lights to the connector at the front of the truck. Didn't use the flex coil wiring kit as I have a roadmaster nighthawk.
Comments
The bonded four wire that comes with the kit is 30 feet long. The installation manual advises to run the wire along the frame rail under the vehicle being careful to route it away from heat sources. You can see an install on a 2016 Ford 150 truck in the link below. I know it is not the same as your truck however the installation will be similar.
-- Jenny N - 10/22/2021Roadmaster Diode Flexo-Coil Wiring Kit Installation - 2016 Ford F-150 - Video
![Roadmaster Diode Flexo-Coil Wiring Kit Installation - 2016 Ford F-150]()
by: Clay 11/12/2022
Easy to use. Works great.
by: Robert04/27/2022
Excellent service as always from etrail er!!
by: Jason08/26/2022
Great product and fair pricing. Complex, but easy install. Very happy with the purchase and highly recommend.
by: Steve09/19/2022
The kit had all the pieces I needed and works great.
by: Ashley 09/24/2022
Awesome. Easy to install!
by: Todd 09/23/2022
Works correct
by: Charles 02/03/2022
Fiat
Great product just a bit tough to install on our Fiat. Not an issue with the product just tight working quarter in the tail lamps.
by: Gary11/27/2021
Installation instructions were complete and helpful. No problem one year later.
by: Christopher 05/26/2020
2012 Jeep Liberty
This looks like a good quality lighting kit and was easy to install on my 2012 Jeep Liberty.
Comments
Still working great!
Christopher D - 05/27/2021by: Gary P11/19/2018
2015 Ford C-Max
I used this kit on a 2015 Ford C-Max Energi. All in all the installation kit was complete except it was missing the self tapping screw. This was not a problem since I was able to attach the ground wire to an existing ground connection without having to use the screw. It also did not have any screws (2) to attach the socket bracket to the baseplate (I used a Blue Ox BX2639 baseplate). Luckily I had a couple laying around. The hardest part was routing the wire harness throughout the undercarriage of the vehicle. I used almost all the wire ties for this part of the installation. I also had to purchase additional wire to run across the rear of the vehicle ( I needed additional green wire for the right side brake and directional and brown to jump to the other side for the parking lights. The directions provided in the kit were helpful but I relied quite a bit on the installation videos you provided. I found the videos provided much more detail and guidance.
by: Loran05/20/2022
Haven't done anything with it yet.
by: Mark Jensen07/15/2019
2005 Jeep TJ
Never flat towed before, enlisted etrailers help on what to get. Just returned from a 4000 mi trip to the northwest ! Had no problems towing a 2005 Jeep lj behind my motor home. Thank you etrailer for your assistance and great videos! Installed the system myself! Very happy!
by: Michael07/23/2018
2009 GMC Sierra
etrailer has been fantastic to work with...email traffic after the sale was timely and informative as to when my items would ship, when they would arrive and then follow up if I was satisfied...this wiring kit assembly was easy to install...I utilized the provided directions and videos provided on this site and others...happy with the service, happy with the product, will order again
by: Pamela05/24/2022
2020 Jeep Cherokee
Very good product and came on time
by: Gary S.07/21/2017
2014 Jeep Grand Cherokee
As you can see, I ordered the components necessary to allow me to flat tow my Jeep Grand Cherokee behind my motorhome. I followed the recommendations made by one of your employees as far which components would be necessary to meet my objective. Now that I have utilized this equipment to tow our vehicle over two separate trips to Seattle, Washington and also to Tucson, Arizona, I can report that we have been very satisfied with every aspect of our purchase. Thank you, again, for the expert assistance!
by: Dana04/19/2017
One major draw back that is see is that none of the wire connector spades you crimp on the end of the wires were of the Heat Shrink type. This leaves the wire exposed to water and possible corrosion. Need to spend the extra $$$'s and upgrade the spade connectors to the Heat Shrink type.
by: Curtis 10/18/2021
Pleased with the high quality and craftsmanship.Did everything I expected. Easy install. Would recommend.
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See what our Experts say about this Roadmaster Tow Bar Wiring
- What Is Best Flat Towing Wiring Harness for 2020 Ford EscapeWe don't have any tow bar wiring kits for your 2020 Ford Escape that are plug and play but the diode kit part # RM-15247 that you referenced would be the easiest and best option. This does come with install instructions and I also attached an install video you can use as a guide that shows the kit installed on a similar vehicle.
view full answer... - Tow Bar Lighting Kit Recommendation for 2020 Ford ExpeditionWe don't have a tow bar wiring setup that fits your 2020 Ford Expedition that is plug and play but we do have great diode kit solutions like the Roadmaster part # RM-15247 which installs by splicing inline with the taillight circuits of your vehicle.
view full answer... - Testing Flat Towing Diode Kit on 2006 Mini CooperIn a flat towing diode wiring setup such as with Roadmaster Diode 7-Wire to 4-Wire Flexo-Coil Wiring Kit # RM-15247 you can test the functionality of the installation on the toad by applying 12V power from a spare battery or even from the Mini's battery. You'll want to confirm which pin on the vehicle connector is grounded, either to the battery negative terminal or to a chassis ground. This should be the wire with the ring terminal. Then one at a time apply +12V power to the other pins...
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view full answer... - Will Roadmaster Diode Kit RM-152497 Fit 1995 Geo Tracker and Work With Monaco MotorhomeIf your tow vehicle, the motorhome, has trailer wiring on it already it has the circuits combined as that is the standard way trailer wiring is ran. That means that for a diode wiring kit for your 1995 Geo Tracker the part # RM-15247 would fit and be exactly what you want without needing any further wiring or adapters.
view full answer... - Tow Bar Wiring Recommendation for 2018 Jeep Wrangler JL UnlimitedThe Roadmaster Diode kit part # RM-15247 is a confirmed fit for your 2018 Jeep Wrangler JL Unlimited. It also comes with an umibilical adapter to span the tow bar that has a 7-way connector on it. This kit wires into the taillight circuits of your vehicle and allows the tow vehicle to operate the taillights of the vehicle.
view full answer... - Troubleshooting Weak Lighting Signals on Flat Towed 2008 Jeep WranglerThe issue you describe sounds like a classic grounding problem. Weak or loose grounds can cause all sorts of weird behavior from lighting circuits so I suggest you carefully check all wiring and connectors for grounding your towed Jeep Wrangler. Sometimes corrosion can develop in places where it is tough to spot, such as under a ring terminal or even inside a plug. Try removing the grounds and cleaning/sanding those grounding points thoroughly to remove paint, primer, rust, grease or even...
view full answer... - If Stop Light Fuse is Pulled on Vehicle is Brake Lite Relay Needed When Flat TowingI'd test the fuse solution first to make sure that the stop/turn signals of your vehicle do not come on at all when that fuse is pulled. If you will be using a diode kit for lighting like the part # RM-15247 which powers the taillights and the fuse being pulled does prevent the taillights from activating this would work well. This typically isn't recommended as basically you will be creating a kill switch for your brake lights...which is something that people looking for insurance money...
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view full answer... - Estimated Install Time For Roadmaster Wiring Kit RM-15247 on 2007 Honda AccordInstallation time can vary pretty significantly depending on the individual installing it, but a decent estimate is somewhere in the 2 hour range or so for a 2007 Honda Accord when installing the Roadmaster wiring kit you asked about: - Roadmaster Diode 7-Wire to 4-Wire Flexo-Coil Wiring Kit # RM-15247
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view full answer... - Recommended Flat-Tow Wiring Harness for 2018 GMC Sierra 2500 and Is Brake Relay NeededThe Roadmaster Diode 7-Wire to 4-Wire Flexo-Coil Wiring Kit part # RM-15247 is an excellent option for a 2018 GMC Sierra 2500 that will work well to illuminate the vehicle's tail lights using the motorhome. In regards to the Roadmaster Brake-Lite Relay Kit for Towed Vehicles part # RM-88400, this is not required for a 2018 GMC Sierra 2500.
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view full answer... - Tow Bar Wiring Harness Recommendation for a 2016 Jeep Cherokee TrailhawkWe have installed diode kits on Jeep Cherokee Trailhawks (and other models that have LED lights) and they have worked fine. For a diode kit I recommend # RM-15247. I have also included links to a couple of videos showing example installations. You can see the vehicles have the LED tail light assemblies like on your 2016 Cherokee. If your Cherokee has 4 wheel drive or the Active Drive II system, to maintain the vehicle's stable steering while being flat towed you will want to install the...
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view full answer... - Flat Tow Wiring for 2015 Subaru ForesterBoth the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267 and the 7-Wire to 4-Wire Flexo-Coil Wiring Kit # RM-15247 will work with your 2015 Subaru Forester so you can use either. The only difference between the two is that the 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267 will provide you with a 6-way connector at the front of your Forester and # RM-15247 will give you a 4-way . Otherwise, the two operate exactly the same.
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view full answer... - Tow Bar Lighting Solution for 2001 Chevy SilveradoFor your 2001 Chevy Silverado there isn't a plug and play style of tow bar wiring available so your best option would be a diode kit like the part # RM-15247 which wires into the taillight wiring of your truck and allows the tow vehicle to control the truck's taillights.
view full answer... - Availability of Plug-In Tow Bar Wiring Kit for 2021 Jeep Wrangler UnlimitedI recommend the Roadmaster Universal Hy-Power Diode Wiring Kit # RM-154 if you have an older motor home with a 4 pole connection. If you have a newer motorhome with a 7 pole connection I recommend the Roadmaster Diode 7-Wire to 4-Wire Flexo-Coil Wiring Kit # RM-15247.
view full answer... - Where To Splice The Roadmaster InvisBrake Into The Tail Light Wiring Harness On A 2019 Jeep WranglerThe Roadmaster InvisiBrake Supplemental Braking System # RM-8700 can be spliced into trailer lighting harness before the diodes. Before meaning the wiring between the 4-pole connector and the diode. After being the wiring between the diode and the tail light. In the attached installation video (24 min. mark) Shane splices into excess wiring bundled up in the engine bay.
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view full answer... - Can 4-Way Connector Be Installed On 2019 Jeep Wrangler With Flat-Tow Splice In Diode Kit InstalledThe Roadmaster Diode 7-Wire to 4-Wire Flexo-Coil Wiring Kit # RM-15247 you are purchasing is a great choice for powering the lights of your 2019 Jeep Wrangler Unlimited when it is being flat towed, and you can absolutely still install a 4-way connector on your Jeep for powering the lights of a small utility trailer when it is not being flat towed due to the # RM15247 being a splice in kit meaning both harness will attach in different ways. With that being said the Tekonsha T-One Vehicle...
view full answer... - Could 4-Way Get Tapped Into Diode Wiring of Jeep being Flat Towed for Trailer Towed Behind DinghySounds like you are trying to power the taillights of your trailer as it is being flat-towed behind an RV and Jeep. Connecting 4-way wires to the diode kit you have with something like the part # 18252 would accomplish this.
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