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Tow Ready 4 Pole to 5 Pole Trailer Wiring Adapter

Tow Ready 4 Pole to 5 Pole Trailer Wiring Adapter

Item # 20036
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Tow Ready Wiring - 20036
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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 800-298-1624 for expert service.
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Tow Ready Wiring - 20036

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

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:  4.9 out of 5 stars   (210 Customer Reviews)

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

- 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.


Comments
Everything is working well. I did receive a call from etrailer from a guy who told me exactly how to find the wire i needed to splice into. That was a very pleasant surprise. Great Company and Great Customer Service.
Joey J - 08/16/2021


- 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.


Comments
the product is still holding true to the truck and still preforms just as it was the day I installed it
Eldon W - 03/29/2021


- 20036
by:

Adapter 4-pole To 5-pole Flat - works as described. Installed on 2013 Chrysler Town & Country. Connected blue wire to left rear light harness. Strongly recommend using a 12v tester for this install, as visual diagnosis can be wrong. Deduct one star because 5-plug has no cover and is susceptible to road grime. My solution is to leave original 4way plug with cover underneath the vehicle and connect 5plug adaptor only when towing boat.



- 20036
by:

Simple install on my Jeep JK. Tapped the reverse light lead wire and harnessed all the wires in flex conduit. Tie strapped it all under bumper. Can either use 4 or 5 pin trailer.



- 20036
by:

There tracking method is terrible, it showed package was still at there warehouse for a week, when it was really in route, almost canceled.



- 20036
by:

This was exactly what I needed. Our Nissan Pathfinder came with a 4 prong plug already installed, but our new boat trailer has a 5 prong plug. This fit perfectly, works great (already used it this past weekend) and the installation was easy, thanks in part to the instructional video included on the product page. Would definitely recommend to anyone that needs to go from a 4 prong to 5 prong for your trailer.


Comments
Which wire did u crimp on to for your Pathfinder? Could u tell me the colour pls. Thanks.
-- comment by: Rich S - 06/08/2014

We've sent Chris an email to let him know about your question. Remember to always double check a wire with a circuit tester before connecting. Wire colors can change on the same model, even in the same year so the colors may not be the same. Just check before splicing.

-- Etrailer Expert Patrick B - 6/10/2014


- 20036
by:

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.



- 20036
by:

Works great. The only issue is it does not come with a dust .



- 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.



- 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.



- 20036
by:

This is for a 2014 Jeep Cherokee Latitude. It took me a little extra time as my helper was a 5 ton floor jack and it supported the receiver and if only my right foot had fingers it would have helped a lot. Loading the bolts and plates into the frame was a snap, I left the fish wires on the bolts and that helped a lot and I didn't lose a bolt into the frame,you must leave the exhaust hanging to get to the rear bolt closest to the exhaust curve just before the mufflers I didn't and it was a bear to torque it. Also after I cut the opening on the bottom of the bumper and already had torqued the receiver I had to pry the bottom edge over the receiver there was no other way to get the hitch up inside not enough forward space to get it to slide up and in. Other than that it was a snap. Now for the wiring harness, went well had a bit of a time getting the connectors up to the tail lights even with all 4 screws out and a little bit of play I had to pry the plastic support away from the body to get the connectors through. That was for the 4 flat, for the power for the harness I have a rig runner 4005 from Powerwerx for all my power as I am a volunteer Fire Fighter and have all the goodies that goes with it and every thing runs fine. For the 5 flat all I had to do was find and take out the backup bulb in the tail light and test to find which wire was hot. And then it was over and done put it all back together and drive away with my trailer. Sorry no picture it looks just like the factory/dealer put it on. Ray H



- 20036
by:

More than satisfied, along with super fast delivery WOW



- 20036
by:

It is so rare these days to speak with a real human when you need some help with a complex situation. It’s even rarer to have someone call you back as well! The Sales Associate that helped me with my issue, Emily, was truly amazing. She surprised me with the depth of her knowledge and she steered me in the right direction. What service!



- 20036
by:

I have been using adapter #47515 to convert my 4 pole vehicle to my 5 pole trailer plug. The extra wire was necessary to operate the solenoid on my surge brake trailer. It worked ok, but because the wire came into the 5 pole plug at a right angle, the wire seemed vulnerable to bending and then breakage. This product has the extra wire coming straight out the back to alleviate the bending/breakage concern. So far it has met my expectations.



- 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



- 20036
by:

This seems to be a good option for an adapter to get a 5 wire trailer connection. The single wire for the back up light connection is odd to secure to wire harness so it don't get damaged from dirt. The socket could have a cap to cover so dirt can not get in it when not in use.



- 20036
by:

This 4pole to 5 pole adapter works exactly as advertised. Now my trailer brakes don't lock up when backing up on an incline. Took about 10 minutes to install and corrected my problem perfectly. I especially like the "how to" videos!



- 20036
by:

Had to purchase the part for a boat trailer hook-up. etrailer was the only place and first place we looked. Our local trailer dealer did not stock the part, so having purchased an item from etrailer before, we chose the company to purchase what we needed. The online videos were very helpful and installation was very easy. Shipping was fast and we are completely satisfied with the product and the company.



- 20036
by:

I ordered a hitch, wiring harnesss, and a 5 pin harness adapter. Received product faster than expected. Installation was easier than expected because of the very accurate videos. I spent more time gathering my tools than actually plugging in the wiring harness. Hitch was installed in 10 mins. Took me longer to get the hitch out of the expertly packed box. I believe the success of etrailer is that they heavily research products and only offer quality, consumer forward items to us, the customers. I had an above average experience. Thank you!



- 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.



- 20036
by:

The 4 to 5 wire connector harness is exactly what I needed to covert my vehicle for towing surge brake trailers. It was easy to install and works great. Fast shipment and easy to use website. Good follow up and tracking updates. A+ buying experience.



- 20036
by:

Product does exactly what you'd expect -- make my funky 5 pin trailer work with my four pin Toyota Highlander. I am sure that its a good idea to have engineered the safety brake but taping the interlock gets old. Product is well made, the instructions were very clear and it was well packaged and arrived quickly. Importantly, customer service reached out to me to make sure it arrived and that I was happy. That's impressive too.



- 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


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



- 20036
by:

etrailer customer service rep was very knowledgeable and verified the product would work on my SUV. The shipment was fast and allowed me to track the progress of delivery!! Installation was a breeze! I would use etrailer again and again!!



- 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!


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Show More Reviews

Ask the Experts about this Tow Ready Wiring

  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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 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...
  • 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...
  • 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...
  • 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 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...
    Image 1 for Image 2 for
  • 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...
    Image 1 for
  • 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...
  • Connecting separate reverse trailer lights using 5-pole wiring harness
    You are definitely on the right track. Start off by installing the Tow Ready 4 Pole to 5 Pole Trailer Wiring Adapter # 20036 on your tow vehicle with the Blue wire running to your reverse light signal. Once that is done I then recommend cutting off the 4-Way Flat connector on your trailer side and installing the Hopkins Endurance 5-Way Flat Trailer Connector # HM47910 using Butt Connectors # DW05744-10 to secure your connections (wires on the 5-Way are labeled). You can either run to...
    view full answer...
  • 4-Way to 5-Way Adapter Recommendation for 2015 Ford Edge
    We have exactly what you are looking for. The 4-way to 5-way adapter part # 20036 will convert the 4-way to a 5-way and will allow you to run the additional wire to the reverse light circuit on your Edge so that it will activate the reverse lock out solenoid of your surge brake actuator.
    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...
    Image 1 for
  • 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...
  • 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...
  • 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...
  • 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...
  • Trailer Lights Come On But Brake and Turn Signals Do Not Work Using 4-Flat with 5-Flat Connector
    You are correct in assuming that the light functions on the trailer should work when connecting the 4-flat connector from your 2002 Toyota Highlander to the 5-flat connector on your trailer as long as everything is wired correctly. If you are saying that the trailer lights come on when you plug the trailer connector to the vehicle connector and the brake or turn signals do not work, then it sounds like something is not wired correctly. I suggest using a circuit tester like part...
    view full answer...
  • How to Connect 4-Way on Kia to 5-Way on Venture Boat Trailer
    The extra pin/circuit on the 5-Way connector for your Venture boat trailer is likely to activate the reverse lockout solenoid on the actuator (so you can backup the trailer without the brakes engaging). The 4-Way on your Kia can technically still connect to the 5-Way on the trailer to power its basic signal lights, but you would lose this reverse function. To maintain the reverse lockout function on the trailer the best solution is with the 4-Way to 5-Way Adapter # 20036. This will...
    view full answer...
    Image 1 for Image 2 for
  • Adding Reverse Lights on Boat Trailer to Maintain Reverse Lockout on Coupler
    Let's work on getting some feeling back into your brain! I will break down the easiest solution for what you are wanting to do into two separate sections; your tow vehicle and the boat trailer. Starting on your tow vehicle, the easiest route to take is going to be to use a 4-Way to 5-Way adapter like the Tow Ready # 20036. This will plug right into the existing 4-Way to provide a 5-Way flat on the other end to match what you have on the trailer. The additional blue wire coming from...
    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 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...
  • Access to Reverse Light Wire on 2007 Honda Pilot for a 4- to 5-Way Adapter for Trailer Surge Coupler
    Normally you could use a fuse tap and tap into the reverse light circuit fuse to get the signal needed. But on a 2007 Honda Pilot the reverse light fuses have other functions on them so that would not work. If you can access the wiring directly behind the reverse light (like if you were going to change out a bulb) then you could get it there instead of having to remove the headliner. If you cannot access the wiring there either then removing the headliner is the only remaining option.
    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...
  • Where to Tap Into the Reverse Light Wire on a 2012 Honda Odyssey for a 5-Way Trailer Connector
    Normally what you would do is remove the tail light assembly that contains the reverse lights and test the wires for the reverse light circuit and tap in there. I have also heard that the reverse light circuit can be tapped into at the fuse panel inside the vehicle, under the hood, or in a wiring harness behind the driver side front kick panel. You would need to use the owners manual to determine where the fuse is for the reverse lights. If you tap in there you can use a fuse tap like...
    view full answer...

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