1. Wiring
  2. Tow Ready
  3. Wiring Adapters
  4. Single-Function Adapter
  5. 5 Flat
  6. Plug and Lead
Tow Ready 4 Pole to 5 Pole Trailer Wiring Adapter

Tow Ready 4 Pole to 5 Pole Trailer Wiring Adapter

Item # 20036
lowest price pledge
Retail:$29.25
Our Price: $16.80
You Save: 43%
Wiring
Orders above $50 qualify for Free Shipping
Shipping Weight: 0.29 lbs
Quantity: 
In Stock
Tow Ready Wiring - 20036
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

Trailer wiring adapter changes the 4 pole flat on your vehicle into a 5 pole flat. Lowest Prices for the best wiring from Tow Ready. Tow Ready 4 Pole to 5 Pole Trailer Wiring Adapter part number 20036 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (187)
  • Q & A (393)
  • Videos (5)
  • Photos
  • Why etrailer?

Tow Ready Wiring - 20036

  • Wiring Adapters
  • Single-Function Adapter
  • 5 Flat
  • Plug and Lead
  • Tow Ready
  • 0 - 5 Feet Long
  • 4 Flat

Trailer wiring adapter changes the 4 pole flat on your vehicle into a 5 pole flat.


Features:

  • Length of harness: 20"
  • Length of blue wire: 60"


The blue wire gets spliced into the reverse light wire on the vehicle which is easily done with the included quick splice wire connector.



20136 Tow Ready 4 Pole to 5 Pole Trailer Wiring Harness




California residents: click here


Video of Tow Ready 4 Pole to 5 Pole Trailer Wiring Adapter

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Tow Ready Wiring - Wiring Adapters - 20036 Review

Today we're going to be reviewing part number 20036. This is the Tow Ready 4-pole to 5-pole trailer wiring adapter. This wiring adapter is going to change the 4-pole flat on your vehicle into a 5-pole flat. The length of the actual harness is going to measure 20 inches from end to end, and then the length of the blue wire that it comes with to make the connection into the reverse light function is going to be 60 inches. This unit is rated for 7.5 amps per circuit. It's going to come with some zip ties to help secure the access wire up and out of the way.

The 60-inch blue wire is going to get spliced into the reverse light wire on the vehicle. It's very easy to do because they include this quick splice wire connector. Then the connector on the blue wire, the plug in one, is going to connect to the blue wire coming from the harness. So those will go in together, which is then going to supply power over to the new, 5-way flat, and then you're going to have all the power you need. Once everything is connected, you're all set and ready to go. Again, this one right here is going to measure 20 inches.

And then the length of the blue wire is going to measure 60 inches. And it's a very easy system to install and get connected. That's going to do it for our review of part number 20036. This is the Tow Ready 4-Pole to 5-Pole trailer wiring adapter. .


Customer Reviews

Tow Ready 4 Pole to 5 Pole Trailer Wiring Adapter - 20036

Average Customer Rating:  4.8 out of 5 stars   (187 Customer Reviews)

Trailer wiring adapter changes the 4 pole flat on your vehicle into a 5 pole flat.

- 20036
by:

Great product and easy to to connect. I could not find this trailer connection at any of our usual local auto parts store 420820


Comments
It’s working out great been able to pull my boat in the early morning with no issues
Albert S - 08/17/2018

42521

- 20036
by: 11/03/2020

907408



- 20036
by:

Good price, delivered on time. 895361



- 20036
by: 09/24/2020

The adapter was fine. The video showing how to route the backup light wire to the harness was terrible. Routing a wire under the hatch seal caused a leak that went undetected for 3 months. Had to pull all the seats out several times, remove all the moldy carpet padding, scrub the car and carpet many times, replace the padding, put all the seats back and have the interior professionally detailed. A better method is to route the wire under the headliner down the side. Stay away from the hatch seal. 892069



- 20036
by:

The product was perfect! I wish I had found your company earlier. 887037



- 20036
by:

871317



- 20036
by:

Everything is as described. All of the tutorial videos are Excellent. Unfortunately, There is no install video for my make and mode. However, i have reached out to eTrailer and am waiting on their reply now. 862596



- 20036
by:

The install was extremely easy on my 2017 Jeep Wrangler. Just route the wire from the left backup light down to the trailer connector following the current wire bundle. I haven't tried it with the trailer but with the back up lights on there was voltage to the trailer connector, so it should work. Super fast shipping also. 853148



- 20036
by:

The wiring harness works great even one year later, thanks etrailer. 824994



- 20036
by:

With my 30 yrs experience of Installation this was pretty smooth , client hasn't had a chance to use. 827727



- 20036
by:

I used this part to convert the four-pole wiring in my 2014 Toyota Sienna Van (previously installed using etrailer.com parts) to a five-pole so I can pull a boat trailer with hydraulic "surge" brakes. Everything worked well, but I had to get an extra length of wire and a butt connector at an auto parts store for my Toyota Sienna. The most time consuming part of the process was finding the reverse light wire in the bundle of wires going to the tail lights. A test light with the ability to pierce a wire (sharp point) is required for this. 815897



- 20036
by:

Works great, as described on trailer site. Fast shipping, no issues. 809577



- 20036
by:

Blown away by the communication and fast shipment from etrailer The video instructions made the installation simple. 807417



- 20036
by:

Excellent product, fast delivery 805238



- 20036
by:

I needed a wiring adapter for my new boat trailer. Etrailer had the solution at a very reasonable price and with prompt international delivery. Thanks guys! 803142



- 20036
by:

Bought this item to convert four wire flat pin to five wire flat pin for use with a boat trailer with surge brakes. Kit worked as advertised. Only issue was they could have made the fifth wire two feet longer. Installation as per your video, which is very good, required splicing additional wiring to complete the connection To the backup circuitry. 800369



- 20036
by:

Went in as shown on directions. Very explicit and accurate!! Trailer hitch frames went in exactly as shown on the instructions and video! 782695



- 20036
by:

4 to 5 pin wiring plug is awesome bought the bracket that it fits in to secure to truck and it works very well was very secure until I backed into trailer hitch with it ..its still square and hold tight just need to rescrew it back on with bigger bolts and it will be good as new. I recommend this to everyone that needs 4 to 5 pin for there trailers its so easy to install takes 5 minutes. 770662



- 20036
by:

Very happy with product. Worked well, achieved what l wanted. Thanks Noah for your help getting the correct device. 765554



- 20036
by:

Hitch and light harness installed today. Every part fit perfectly as recommend on the website. Quality of the product is excellent. I had to message the company to verify the products needed, they responded timely and accurately with the part numbers etc. Product received on time undamaged and packed very well. I had a very good overall experience with this firm and highly recommend them. Ron 739519



- 20036
by:

After a year it still works great. 738914



- 20036
by:

After 1 year, still works great for my trailer. Highly recommend. 732519



- 20036
by:

Awesome items great prices fast shipping good service 731030



- 20036
by:

Installed and worked as expected. 728687



- 20036
by:

great site, helpful instructions and support. The install was easy because of those instructional videos. Great work! -Albert 716917


25
189
Show More Reviews

Ask the Experts about this Tow Ready Wiring

  • Extra Wire Needed To Install Tow Ready 4 Pole to 5 Pole Trailer Wiring Adapter
    The Tow Ready 4 Pole to 5 Pole Trailer Wiring Adapter part # 20036 uses 16 gauge wire for the reverse light circuit. Therefore, you can use the 16 Gauge Primary Wire part # 16-1-1 (per foot). Once you have identified the reverse light circuit on the vehicle you can use the Quick-Splice Connector part # SWC502905-1.
    view full answer...
  • How To Tow a Boat Trailer That Has A Reverse Lockout Using a 2020 Hyundai Palisade
    There are a few options here for you to tow your boat trailer and be able to backup with the trailer attached and the brakes not locking up. The most cost effective option is a wiring adapter, the Tow Ready 4 Pole to 5 Pole Trailer Wiring Adapter part # 20036. The downside of this option is that you have to splice into the factory reverse light wire on your vehicle. If you don't want to do this then you can either install a trailer coupler with manual lockout like the Brake Actuator with...
    view full answer...
  • 5 Pin Installation on 2020 Telluride
    It sounds like you're trying to use the Tow Ready 4 Pole to 5 Pole Trailer Wiring Adapter # 20036 on your 2020 Kia Telluride. In order to find which wire corresponds to the reverse light circuit on your vehicle you will need to use a circuit tester like the # PTW2993 and have someone put the car in reverse to see which wire is activated; this is how you determine which wire represents the reverse light circuit. From there, you can splice it into the reverse circuit wire on the Tow Ready...
    view full answer...
  • Part Needed to Convert 4-Pole Wiring Harness to 5-Pole Flat Connector Format
    We do not have 5-pole type wiring harnesses for your 2012 Chevrolet Traverse but it is easy enough to adapt 4-pole wiring to the 5-pole format simply by adding an adapter kit. We offer three such items, parts # 20036, # 47515 or # C57187. I linked an install video for part # 20036. All of these include an additional wire/circuit to allow connection to the reverse light circuit for a trailer coupler lockout function or for any other circuit function you require.
    view full answer...
  • Parts Needed to Convert Trailer Connector of 2020 Ram 1500 to 5-Way
    Yes, the 4-way to 5-way part # 20036 that you referenced is the correct adapter you'd need to convert the 4-way of your 2020 Ram 1500 to a 5-way unless your truck has a 7-way as well. If you have a 7-way trailer wiring connector as well you'd just want the # A75TB for a much easier install as this just plugs right in and does't require any splicing.
    view full answer...
  • Can 5-Way with 6 Wires be Ran to 5-Way with 5 Wires
    Yes, you can run both of your trailer's brown wires to the single brown wire of your new 5-way. Typically this is how most 5-ways are wired. Your old one was a wishbone style connector which means it has the two wires already for that circuit.
    view full answer...
  • How to Find the Backup Light Circuit on a 2011 Nissan Murano for Installation of the 5 Pole Adapter
    You are correct, you will need to access the rear tail light wiring, see video link, and then use a circuit tester, item # 3808 if needed, to determine the correct wire to splice into for the backup light circuit. The wire colors on vehicle wiring changes so often that testing for proper function is the best way to be sure you have the correct circuit identified. You can normally find the reverse light circuit pretty easily by looking for the connection point behind the reverse light...
    view full answer...
  • How to Find Reverse Light Circuit on 2018 Chrysler Pacifica
    You're on the right track; this is the correct adapter, and the best place to look for the reverse light circuit when installing the Tow Ready 4 Pole to 5 Pole Trailer Wiring Adapter # 20036 is on the tail light assemblies on your 2018 Chrysler Pacifica. When installing this adapter, you may need to have a friend activate each function and test the wires using a circuit tester like the # PTW2992 to get the correct wire to tap into.
    view full answer...
  • 4-Way to 5-Way Adapter Recommendation for Boat Trailer with Surge Brake
    You'd have to use a 4-way to 5-way adapter as you'd need a separate pin for the 5th circuit. If you tried to run it on another circuit you'd have issues on both circuits. So the correct adapter you'd need is the part # 20036. The fifth circuit would need to be ran to the reverse light circuit of your vehicle.
    view full answer...
  • How to Find Reverse Light Circuit on a Vehicle that Has Reverse Lights Mounted in Hatch
    Between the hatch and the door frame will be a wire loom in a rubber conduit that will be carrying the reverse light circuit. What you will want to do is peal back the conduit so that you can test the wiring there for a circuit with a tester like part # PTW2993 that only sees voltage when the reverse light circuit is activated. Once you find that circuit you will want to trace the wiring back somewhere on the door frame side to a place that allows you to easily access it. Most likely this...
    view full answer...
  • 4-Way Flat to 5-Way Flat Adapter for Boat Trailer
    We do have an adapter to go from a 4-Way on a vehicle to a 5-Way on a trailer. You can use # 20036. The extra blue wire will get wired into the reverse light circuit on the vehicle. The 5th wire on a boat trailer 5-Way is usually for an electric reverse lockout. When the vehicle is placed in reverse it sends a signal back to a solenoid on the actuator and does not allow the brakes to engage. You might also check your ground wire to make sure you have a clean ground.
    view full answer...
  • Comparing 4-Way to 5-Way Trailer Connector Adapters # 20036 and # 47515
    4-Way to 5-Way adapters # 47515 and # 20036 are essentially the same. The difference is that # 20036 has longer wiring with it than # 47515. For that reason we normally recommend # 20036. The 4-Way to 5-Way portion is 18 inches long. The blue wire though is 60 inches long from end to end. Additional light gauge wire, such as # 16-1-1, sold in 1 foot increments could be spliced in if a longer connection is needed.
    view full answer...
  • How to Convert a 4-way Trailer Connector on a 2019 Subaru Ascent to a 5-way
    The 4-pole to 5-pole adapter part # 20036 is the best way to adapt the 4-way on the Subaru Ascent to the 5 pin connector on the trailer but it does require you to splice into the reverse light wire. The reverse light circuit signals the lockout on the brake actuator while backing up the trailer so the surge brakes do not activate. The blue wire on the adapter splices into the reverse light circuit on the Subaru The reverse light wire is normally located behind the taillights of the...
    view full answer...
  • How Does the Adapter 4 Pole to 5 Pole Trailer Wiring Adapter Install on a 2003 Dodge Ram 1500
    The 4-Way to 5-Way adapter does not have vehicle specific instructions. There is only one connection that you need to make and that is to the blue wire included with the adapter. You will use the included quick splice connector and attach the blue wire to a reverse light wire on the truck behind one of the reverse lights. I have included links to a couple of videos that show how the adapter installs. The process will be very similar on your 2003 Dodge Ram 1500.
    view full answer...
  • Can a 4-Way Trailer Connector be Plugged Into a 5-Way Vehicle End Trailer Connector
    You will still be able to use the trailer with the 4-Way after installing the 4 to 5-Way adapter, # 20036. First, you could just remove the adapter if you wanted to and then plug in the 4-Way like normal while stowing the adapter in the truck. The extra wire in the adapter what just not be used. Or, you could plug the 4-Way into the 5-Way end of the adapter. The extra pin on the end is for the extra function on the 5-Way, otherwise, the functions are the same for all the other pins....
    view full answer...
  • How To Adapt 2015 Ford Explorer 4-pin To 5-pin on Boat Trailer
    All that you need to adapt the 4 pole flat to the 5 flat on the boat trailer is Tow Ready 4 Pole to 5 Pole Trailer Wiring Adapter part # 20036. Since the boat trailer has a 5 flat then it has a reverse lock out. The blue wire from the 4-pole to 5-pole adapter will need to be spliced into the reverse circuit of the Explorer. The reverse light circuit is at the back of the tail light assemblies of the Explorer. You may be able to access the back of your tail lights by carefully loosening...
    view full answer...
  • How to Install Tow Ready 4-Pole to 5-Pole Trailer Wiring Adapter 20036
    Tow Ready 4-Pole to 5-Pole Trailer Wiring Adapter # 20036 is exactly what you need to allow your Honda Pilot with 4-pole trailer wiring to operate the reverse lockout feature on your trailer coupler. All you need to do is find a taillight wire that carries the reverse light signal. You can do this by tracing the wire to the reverse light bulbs or by testing the wires with a circuit tester like # 40376. Once you find the reverse light wire simply install the extra pigtail lead included...
    view full answer...
  • Recommendation to Connect 4-Way on Honda Pilot with 5-Way on Boat Trailer
    I have the perfect solution for you. In order to connect to the 5-Way on your boat trailer, I recommend using the Tow Ready Trailer Wiring Adapter # 20036. This will plug right into the 4-Way already on your Honda Pilot and provide you with a 5-Way to use for the boat trailer. The additional blue wire from the adapter will then just need to be connected to the reverse light wire on the vehicle so that it can activate the reverse lockout on the trailer actuator. I have attached a...
    view full answer...
  • Will Reverse Light Circuit of Honda Odyssey Handle Powering Reverse Lock Out Solenoid
    Reverse lockout solenoids do not draw very much amperage at all so the # 20036 attached to your reverse light circuit wouldn't be a problem.
    view full answer...
  • 4-Way to 5-Way Adapter Recommendation for a Ford F-150 Towing Trailer with 5-Way
    It sounds like you have a Wesbar 5-way flat on your trailer and are looking for a way to convert the 4-way on your F-150 to work with it. What you will want is the part # 20036. This will plug into the 4-way on your truck and will have a 5th wire that will need to tap into the reverse lights of your vehicle if the 5th circuit on your trailer is for reverse lights or reverse lock out. I attached an install video for this product for you to check out as well.
    view full answer...
  • How to Connect 4-Way on Toyota Tundra with 5-Way on Boat Trailer
    We have exactly what you need to hook up the 4-Way connector on your Toyota Tundra to the 5-Way on your boat trailer. You are correct that the additional wire on a boat trailer's 5-Way is typically used for the reverse lockout solenoid on the actuator, which prevents the trailer brakes from locking up when going in reverse. You do not need a brake controller to connect to the 5-Way and activate this wire. All you need is the Tow Ready Wiring Adapter # 20036. This will plug right into...
    view full answer...
  • How to Access the Taillight Wiring on the 2011 Hyundai Tucson for Installing a 5-Way Trailer Harness
    To access the wires that supply power to the tail lights at the rear of the 2011 Hyundai Tuscon, you will need to remove two Phillips head screws that hold the tail light assemblies in place, see photo link. After the screws are removed, carefully work the tail light assembly straight out from the rear of the vehicle, wiggling it slightly side to side. Once you have the tail light assembly pulled away from the vehicle you will be able to access the wiring connectors for installing a...
    view full answer...
  • Can Adapter 4 Pole to 5 Pole Trailer Wiring Adapter, # 20036 Be Used on a 1996 Ford Explorer
    Absolutely. The Adapter 4 Pole to 5 Pole Trailer Wiring Adapter, # 20036, is the exact part that I would recommend for your application and the way you have described how to connect it is right on the money. I have included a link to a video that shows a typical installation of this adapter for you to view.
    view full answer...
  • How Would Reverse Light Install on a Boat Trailer
    You would need to have a reverse light circuit ran to your trailer to power reverse lights. If you have a 5-way flat or 7-way trailer connector currently then that circuit is already present. If you have a 4-way harness then you would need to install the part # 20036 on your tow vehicle to allow you to have that circuit. The # BUL78CB is a white light that would work well for this. For more info on trailer wiring and where to find the reverse light circuit on common trailer connectors...
    view full answer...
  • Adding a 5-Way Flat Trailer Connector to a 2017 Toyota Highlander Limited with Tow Package
    First I have to tell you that the 2017 Toyota Highlander warranty cannot be voided if you install or have someone install an aftermarket part. Now if that part was to cause a problem on the vehicle then the repairs would not be covered. With that said I would agree that if the vehicle is pre-wired for a trailer connector you would need an option that doesn't come with a converter. In order to get a 5-Way you would first need to install a 4-Way using # 56042. Then you would need the...
    view full answer...
  • Does 4-Flat to 5-Flat Adapter Require Splicing
    Each of the vehicle-side 4-Pole to 5-Pole Trailer Wiring Adapters such as the Tow Ready # 20036 will require you to spice the blue wire of the adapter into the reverse light wire on your 2018 Toyota Highlander. It is not difficult to accomplish because this kit does come with a quick splice connector and I have also linked a video for you which shows this adapter being installed on a Highlander. You will need a circuit tester like # PTW2979 to find the reverse light signal on your Highlander. The...
    view full answer...
  • How to Install the Tow Ready Trailer Wiring Adapter Part # 20036 on a 2017 Hyundai Santa Fe
    When installing the Tow Ready 4 Pole to 5 Pole Trailer Wiring Adapter part # 20036 on your 2017 Hyundai Santa Fe you will want to use a circuit tester like part # ALL640595 to find the correct wire that is responsible for the reverse light circuit on your vehicle. I have attached an installation video for you and at the 1:30 minute mark you can see the process to find the correct reverse light wire. Please note that this installation video is on a 2015 Toyota Highler and although the...
    view full answer...
  • Recommendation to Install 5 Pole Connector on 2017 Mazda CX-9
    If your 2017 Mazda CX-9 already has a 4-Way connector installed, I recommend using the Tow Ready 4 Pole to 5 Pole Trailer Wiring Adapter # 20036. This will easily change the 4 pole flat on the vehicle to a 5 pole flat. The additional blue wire will simply get spliced into the reverse light wire on the CX-9 with the included quick splice connector. You can use a circuit tester like # 3808 to determine which wire is the reverse wire on your vehicle. If you do not have a 4-Way already installed...
    view full answer...
  • 4 Wire Flat to 5 Wire Flat Adapter Recommendation for Towing a Trailer with Surge Brakes
    You are totally on the right track. The Adapter 4 Pole to 5 Pole Trailer Wiring Adapter # 20036 that you referenced would be the correct part to use to convert your 4-way to a 5-way to activate the reverse lockout solenoid of your trailer with surge brakes. You would install it exactly like how you described by locating your reverse light circuit and then using the included quick-splice connector to tap the blue wire from the # 20036 into it. Your pictures did make it through also...
    view full answer...

Do you have a question about this Wiring?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality wiring for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate wiring information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Expert Research:
Mike L
Expert Research:
Robert G
Expert Research:
Patrick B
Expert Research:
Michael H
Expert Research:
Jeff D
Expert Research:
Reno H
Expert Research:
Jameson C
Expert Research:
John H
Expert Research:
Adam R
Expert Research:
Jeffrey L
Video by:
Andrew K
Video by:
Kathleen M
Video Edited:
Joshua S
Video Edited:
Dustin K
Video Edited:
Chris R
Test Fit:
Nicholas E
Test Fit:
Randy B
Updated by:
Adele M
Updated by:
Laura H
Updated by:
Alexander C

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.