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  1. Custom Fit Vehicle Wiring
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  5. 4 Flat
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Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Item # 56008
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Custom Fit Vehicle Wiring

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Custom Fit Vehicle Wiring 56008 - 4 Flat - CURT
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Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. Connector plugs directly into existing wiring - no cutting, splicing or tapping required. Converter is made using SMT to ensure superior performance. 1-800-940-8924 to order CURT custom fit vehicle wiring part number 56008 or order online at Free expert support on all CURT products. Guaranteed Lowest Price and Fastest Shipping for Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (155)
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  • Why etrailer?

CURT Custom Fit Vehicle Wiring - 56008

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • Powered Converter
  • CURT

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. Connector plugs directly into existing wiring - no cutting, splicing or tapping required. Converter is made using SMT to ensure superior performance.


  • Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate connection point in rear cargo area
    • Plug in connector
  • Includes a tail light converter to ensure that your vehicle's wiring matches that of your trailer
  • Constructed using surface-mount technology (SMT) for consistent, reliable performance
    • Maximizes trailer light yield and intensity while producing minimal heat
    • Ensures superior operation in rough road conditions
  • Comes with dust cap for 4-way flat connector


  • Maximum amperage:
    • Stop/turn lights: 3 amps per circuit
    • Tail lights: 6 amps per circuit
  • Limited 1-year warranty


This custom-fit T-connector plugs into your vehicle's wiring harness, which is located behind either the driver's-side or passenger's-side interior trim panel in your rear cargo area.

Once installation is complete, the 4-way connector will be stowed within the spare tire compartment of your cargo area.

It is recommended that you use a small amount of grease on all electrical connections - the plug on your automobile and the 4-pole connector itself - to help prevent corrosion.

Tail Light Converter with Surface-Mount Technology

A tail light converter is built into this T-connector. Because most trailers run on a two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your vehicle's three-wire system need to be combined so they are compatible with the wiring system of the trailer. This converter combines the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your vehicle operate.

Curt builds each tail light converter using surface-mount technology (SMT). This method of construction involves soldering electronic components directly to the surface of a printed circuit board. SMT eliminates the need for leads, which are used in older through-hole technology. The result is a circuit board that is smaller yet provides more routing area and that offers superior performance, reliability and durability.

Curt SMT Circuit Boards

Circuit boards constructed using SMT have been shown to perform better under rough conditions with excessive vibration than those made using the through-hole method. And where would vibration be more likely to occur than in towing applications? Curt converters also produce less heat, leading to increased durability and longer life. In addition, lower levels of resistance ensure better performance, especially for parts that operate at higher frequencies.

Each Curt circuit board is made using high-quality components that are pieced together in the most technologically savvy fashion, leading to greater predictability and reliability in functioning.

56008 CURT T-Connector - Surface Mount Technology - 4 Wire

Installation Details 56008 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 56008

Average Customer Rating:  4.7 out of 5 stars   (155 Customer Reviews)

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. Connector plugs directly into existing wiring - no cutting, splicing or tapping required. Converter is made using SMT to ensure superior performance.


Hitch was excellent. Perfect fit. Some difficulty with the weldnuts, as warned in the instructions. Instructions were very good; well prepared and accurate

Delivery was not as good as I was used to with etrailer. Shipment arrived two days after promised date. Probably due to virus problems(?)

Great. Hitch behaves perfectly
Ray S - 06/30/2021

2013 Acura RDX

The product is excellent but the instructions are confusing and not accurate for a 2013 Acura RDX. Do not follow the written instructions in the package. It is much easier than that. Just remove the small panel on the driver side in the rear compartment. Next thread the trailer end of the wire from the inside of the compartment out under the finished floor ( only about 8" or so) this will bring the trailer plug out into the spare tire area. A little tough to wiggle it through but nothing needs to be taken apart. Then plug the blue end of the harness into the blue vehicle plug located inside the panel opening more towards the front and sort of higher up (hard to see). Be sure to plug it in correctly, difficult to undo if plugged in wrong. Then with the supplied double stick attach the harness box to the body inside the panel area. The best spot is just to the rear when looking into the panel opening. The instructions also don't tell you to put the supplied fuse into the "trailer" fuse slot, which should be empty, in the fuse box area under the hood in the Acura 2013. The supplied fuse is a 10 A and the Acura fuse block indicates a 20 A.

2013 Acura RDX

Installation of Class III hitch on my 2013 Acura RDX was straightforward (able to do it by myself), instructions were clear, workmanship of hitch and parts top notch. Wiring harness plugged into factory wiring; just needed to route wires and install a fuse. Price was very reasonable. BRAVO.


Installed hitch receiver yesterday and wiring harness today. To fit in existing grommet at SUV body I cut 4wire next to unit and fed it back through grommet. I then crimp connected 4 wire back to unit. Worked well. I will test with trailer tomorrow. Your site is very helpful with instructional videos etc. Only improvement would be to have plug in connector on 4 wire side of unit.


Installw as easy and went as expected. Parts and receivers were packed appropriately
and there was shipping damage. Installation was helped with a floor jack to hold the receiver in place while I put the bolts in.


This wiring kit is easy to install and I would buy it again.

Jesse - 12/27/2021

2014 Acura RDX

Like everyone else said the instructions are poor. Don't bother reading them. I included some pictures that I hope others can use. Simply open the access panel in the trunk on the driver’s side. If you stick your head in and look right you will see a blue connector. Plug the wire harness into that. In the bag you get two fuses. The big one goes with the red rubber container that you will see on the connector harness. The small fuse goes in the fuse box. So far everything is working great.

2018 Acura RDX

The T connect harness is generally a great product that requires no cutting into your vehicle harness. In this case Acura made it too easy because the power comes through the connector as well. If you have tha Acura RDX get this trailer harness and get your car ready for towing.

2013 Honda Accord

I have only had the product a few days. but the install instructions are poor. They list the RDX and Accord Crosstour side by side and it is confusing.
They also completely leave out the need to add a fuse for the RDX. Though they include it for the Crosstour. Other instructions linked in these reviews do suggest the fuse.

A picture of the location of the connector for the 2013 RDX are included.

The wiring is also a bit to short to go through the most logical grommet, under the car, and to the hitch. Though the instructions do say to leave it in the spare tire bay. But I don't want to have it hanging out of the hatch when I am hooked up.

Don't get me wrong. The product seems to work great, and once I got the instructions right everything is good.


This product fit perfectly. Great service. Great price! The class 3 hitch fit perfectly. Wiring very easy to install. From start to finish about 35min. Free shipping!


Great quality wiring harness at an affordable price.

2015 Acura RDX

The wiring harness looks well made and, once hooked up, worked great. The reason i say 'good' (and i'm hesitant to give it even that) is because of the instructions for the Acura RDX vehicle. The instructions were flat out wrong. There are several reviews on site that explicitly say the wiring hook up is on the left, but we didn't find those until after we had read the instructions included with wiring harness, torn apart half the body panels on the passenger side of the car only to find nothing. Very frustrating to say the least. if anyone reads this, follow the wiring instructions for the 2007 - 2015 Acura RDX that customers have written on the site. not fixing the printed instructions is just plain lazy, selfish and poor quality control. Fortunately the product and have been really excellent and i will definitely buy product off this site in the future... just maybe i'll be a 'man' and NOT read the included instructions.

2014 Acura RDX

Works fine in 2014 Acura RDX, just watch the video before you install it. You don’t have to remove the styrofoam for the tire thing though, just slip the wire through between the foam and the rear metal of the car. I stored the wire in the left hand styrofoam thing beside the spare tire. 4 stars instead of 5 because it includes a 10A fuse for the car fuse block even though the car specifies 20A.

Still works, no worries.
Russ - 05/27/2020


Liked the product and it appears to work good and easy to hook up but the instruction that come with it were poor. I needed to go onto the Internet and find a instruction video to properly install it or I would have missed the part about putting a fuse into the fuse panel to make it work.

2012 Acura RDX

Wiring harness is great but agree with other reviews - instructions are poor, generally too generic. I have 2012 Acura RDX. Instructions say to open driver side access panel, however I didn't need to because the connector is near spare tire on passenger side under the foam insert. Once I located the light blue connector - easy. Look at the prongs for connector, line up and snap together. Insert red fuse in red box and close cover. I also disconnected negative connection to battery before install. Slip protector cover for hitch connection over plug; use to tie up spare wire and cover plug when not in use.

Great! Love the hitch, it just works.
Wendy S - 08/13/2018

2015 Chevrolet Silverado 1500

I installed the Curt trailer hitch P/N C13130 to my new 2015 Acura RDX AWD. It took about 20 - 30 minutes, I took my time. It looks good. It fits flush with the underneath of the rear bumper of the vehicle (although, I don't know if you can really call it a bumper in this new vehicles) or the frame of the vehicle. Just follow the instructions of the movie clip provided by Etrailer. The wiring connection is no problem either. I used P/N 56008. The trailer connector in the vehicle is located (when looking from the rear) opened tail gate, there is a panel on the left side mid-way of the tail gate. Pop the panel out. There is a blue connector tucked inside approximately 10" from the edge of the opening going forward. (NOTE: Acura recommends that you remove the negative connector end from the battery before doing this, which will reset your navigation system, but you can reset it again after connecting the negative cable back to the battery). Plug the trailer wiring into the blue connector inside the opening . Plug the large fuse (10 Amp) into the red fuse holder in the supplied wiring, make sure it sits all the way in. The black box that came with the wiring harness is the light converter. I placed mine by attaching it to the inside frame with the double adhesive tape that came with it, just make sure you clean the frame of the vehicle with alcohol before applying it. You can feel the frame by sticking your hand inside the opening, towards the back, and as a precaution I tied it with a nylon strap. Route the rest of the wire with the connector at the end for the trailer hook up through the lower, rear foam located in the tire compartment and tuck the pig tail into the tire area. When towing a trailer just open the tail gate, bring the connector outside and close the tail gate. The rubber seal around the tail gate is very flexible and will not pinch the wires.
Lastly, inside the engine compartment there is a fuse box with all the fuses. Inside the plastic lid there are additional fuses. I used a 20 Amp fuse and inserted in the 4th slot, then reconnected the battery, and I am done. Please note: I have not towed as yet and can't assert any thing I have done will work. I am only planning to tow 1500 lbs max. My writing herein is for information only of my own installation. I DO NOT RECOMMEND OR IMPLY ANY USE OF TRAILER PARTS, ELECTRICAL MATERIALS IN ANY VEHICLE.

These were better instructions than in the piece of paper that came with the harness. The instructions coming with the harness say to look in the right side... do NOT do that. the instructions are wrong and will cause you a lot of headache taking the car panels off... only to read the instructions above and realize you could have been done in 5 minutes.
-- comment by: Roger - 08/09/2015

2014 Acura RDX

I bought Curt Receiver and wiring harness for my 2014 Acura RDX and can say installing the hitch was just as expected. about an hour doing it myself. the included instructions were pretty much right on. the wiring harness was a different story. it was the correct harness, but the instructions need updated. the instructions were for a previous year. if anyone reads this and has a 2014 Acura RDX and is trying to install a trailer wiring harness listen to these simple instructions. pull the star shaped panel off the DRIVER'S side of the cargo area. what you see isn't where the connection is. the correct connection is about 6" up toward the front of the SUV in the same area. if you put the included fuse in the 'red in-line connection', you still need one in your fuse box (located under the hood) if you want this to work when your done. you can fish the other end toward the spare tire area or simply let it lay in the cargo area. DON'T bust out the leveling styrofoam either way. it can be fished through with a little playing around.

Sam: Thank you very much! I was looking on the right side for harness plug, couldnt find it, you saved my day.
-- comment by: Mike R - 12/04/2014


This is probably my 5th hitch from this company no bs don't waste time with others and also wire kits for trailer lights too

2015 Acura RDX

Easy peasy! All parts needed were included. As others have noted, the instructions included with kit are not very clear but a look through others’ reviews proved helpful. Seems of good quality and at a good price.


I ordered the trailer wiring harness for my 2015 Acura and it couldn't have been easier to install. It took me less than 30 minutes to get it installed and tested. Great product! Would recommend to anyone looking to do it. When I first ordered it, I thought I may have to get an additional part, but it came with everything needed to make it work.

Thanks for the great product and making it so easy to install!

Still working great after a year. Install was a breeze.
Matthew - 07/01/2020


Not only was the trailer hitch electrical component exactly what I needed but the installation instructions were extremely easy to follow and specific to my vehicle. Even for a person without mechanical knowledge, like me. Would definitely recommend purchasing from this Company.

2017 Acura RDX

The harness was very easy to install. Unfortunately, it does not work properly. I tested the harness and there is a failure in the harness. I checked both fuses and they were not the issue.


Worked perfect as advertised rare these days. Thx

2017 Acura RDX

Excellent service, excellent product. Installation instructions were great.

Excellent. Everything fit nicely and the quality was the best.
John B - 04/08/2020

2017 Acura RDX

Unbelievably easy to install both the trailer light kit as well as the hitch! Utube videos fantastic.

Robert S - 08/29/2020
Show More Reviews

Ask the Experts about this CURT Custom Fit Vehicle Wiring

  • Trailer Lights Not Working After Installing Trailer Harness On 2014 Acura RDX
    We have had customers state they had the same problem when installing a wiring harness on their 2014 RDX. You need to add a 20 amp fuse to the location in the fuse panel located under the hood. You should have a legend in your owner's manual or on the inside of the fuse panel cover showing the location for the trailer fuse.
    view full answer...
  • Acura RDX 2014 Connector Location for Installing Curt Trailer Wiring Harness part # 56008
    Thank you for sharing your experience installing the Curt Trailer Wiring Harness part # 56008. The information you gave us should help future customers install this product.
    view full answer...
  • Installing Wiring Harness # 56008 on 2009 Acura RDX
    The socket that the wiring harness, part # 56008 plugs into is located in the cargo area of the vehicle. Remove the spare tire cover and the spare tire. On the drivers side behind the inside trim panel, there is a black junction box. Remove the cover and plug in the connector. The harness includes a fuse that is inserted in the rear fuse box, in fuse location number 3. The connector would route up through the spare tire storage to the cargo area and run out the rear door when needed.
    view full answer...
  • What is the Correct Trailer Wiring Harness for a 2010 Acura RDX
    I spoke with my contact at Curt and he stated that the Curt T-Connector Vehicle Wiring Harness, # 56008, has been tested on a 2010 Acura RDX so you can use it! I have linked a video showing an example installation for you.
    view full answer...
  • Is the Fuse Included with Curt Trailer Wiring Harness, # 56008 Used on the 2007 to 2011 Acura RDX
    According to the installation instructions for the Curt Trailer Wiring Harness, # 56008, the Acura RDX does not require the fuse. The wiring harness also fits the Honda Accord Crosstour which does require the fuse. However, if you find that your wiring harness is not working, it may need the fuse after all. If so, you can check the owners manual to determine where the trailer wiring harness fuses are located and check those spots in the power distribution box and/or fuse box to determine...
    view full answer...
  • Options for Routing 4-Way on Curt T-Connector Vehicle Wiring # 56008 to Outside of 2015 Acura RDX
    My personal opinion would be to allow the connector portion of the Curt Custom Fit Vehicle Wiring, # 56008, to hang out of the hatch on your 2015 Acura RDX AWD when you need to use it. I myself would be a bit reluctant to drill any type of hole in my brand new Acura but this would be totally up to you. If you decide to drill a hole through the floor, double check to make sure that you will not hit anything on the underside of the vehicle. Be sure to seal up the hole once you are done to...
    view full answer...
  • Steps to Install Curt T-Connector Vehicle Wiring Harness # 56008 on 2014 Acura RDX
    Although I do not have a video of the Curt T-Connector Vehicle Wiring Harness, # 56008, being installed on a 2014 Acura RDX, I have attached a copy of the installation instructions which provide pictures as well as a detailed description. Simply open the rear hatch, remove the cargo panels, connect wiring harness to the female connector which is located under the passenger side floor spacer near the back seat, route the 4-way connector to the center of the Acura and out and out the hatch...
    view full answer...
    Image 1 for
  • Curt T-Connector 56008 Connection Point on 2010 Acura RDX
    The wiring harness to plug in the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # 56008 in the 2010 Acura RDX is located under the spare tire near the passenger side floor spacer by the back seat. You will have to remove the spare tire to find it. I have attached a helpful installation video on a 2009 Acura RDX but the location is the same. He finds the plug around the 2:20 time stamp of the video.
    view full answer...
    Image 1 for
  • Troubleshooting Right Blinker Circuit of Curt Wiring Harness for 2014 Acura RDX Not Active
    You've done a great job so far troubleshooting the Curt trailer wiring harness part # 56008 that you have on your 2014 Acura RDX. The next thing you should do is test for voltage on the green wire that feeds into the converter box of the kit. If there's voltage there that would indicate that the box is damaged and needs to be replaced with a new kit. If there isn't voltage there it could be a connection issue with the blue wire connector of the kit. Sometimes just unplugging and plugging...
    view full answer...
  • Troubleshooting Vehicle Warning System Being Quiet After Curt 4-Way is Installed On 2018 Acura RDX
    I reached out to Curt who confirmed the Curt T-Connector Vehicle Wiring Harness # 56008 would not cause the warning system on your 2018 Acura RDX to no longer work. What I believed may have happened is something may have become loose when the harness was installed and that is what is causing your warning system to be quiet.
    view full answer...
  • Curt or T-One Trailer Wiring Harness Recommendation for 2014 Acura RDX
    They both will actually install the exact same. They both use the same trailer wiring connector that's at the rear of your vehicle behind the interior trim panel. I would recommend going with the T-One kit part # 118569 over the Curt part # 56008 though since we have better luck with the T-One brand over the Curt brand in terms of long term reliability.
    view full answer...
  • Will a Relay be Needed to Activate Tow Package on a 2008 Acura RDX
    If you plan on towing a trailer with your 2008 Acura RDX, then a relay may be needed to activate the towing package on your vehicle. The relay completes the wiring circuit to allow you to install a trailer wiring harness, like part # 56008, to allow you to run power and control trailer lights. The relay can be found at an Acura dealer or maybe at an auto parts store. If you are only needing the Curt Trailer Hitch, # 13536, for an accessory like a bike rack, then you will not need to...
    view full answer...
  • Trailer Wiring Harness for a 2006 Suzuki XL-7
    There is a trailer wiring harness that will plug into a factory port on a 2006 Suzuki XL-7. You will need the Tow Ready Custom Fit Vehicle Wiring, # 118372. I have included links to the installation details and a video showing a typical installation. The connection point on the vehicle is located behind the rear trim panel, in the cargo area, on the driver side of the vehicle.
    view full answer...
  • Installing A Trailer Wiring Haness In A 2011 Acura RDX
    For your 2011 Acura RDX, the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 56008 may require an extra fuse to be added, but it does not require a dealer. You can see in the attached video of the 2015 model where that fuse is located under the hood of your vehicle in the fuse box. It was not needed in the 2009 model. The Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118500 may also require this fuse and it is included with the...
    view full answer...
  • Comparing Curt And Tekonsha 4-Way Wiring Harnesses For a 2018 Acura RDX
    In my experience I have found that the Tekonsha harnesses like the T-One Vehicle Wiring Harness # 118569 seem to have less issues than units like the Curt T-Connector Vehicle Wiring Harness # 56008. I feel that Tekonsha uses a more durable power module that holds up better to road vibration and shock inside the vehicle. I also see that the Tekonsha harness for your 2018 Acura RDX added a seperate ground wire rather than using the ground wire in the factory harness. I have linked the installation...
    view full answer...
  • Trailer Wiring Harness for 2016 Subaru Forester
    To install a wiring harness on your 2016 Subaru Forester, you will want to use the Curt T-Connector Vehicle Wiring Harness # C56040. There is no way to adapt the # 56008 wiring harness into a # C56040 wiring harness. The plugs that are designed to connect to the vehicle's wiring system are different. I do not know of any manufacturers that make adapters to alter custom wiring harnesses.
    view full answer...
  • No Power on Trailer Wiring Harness Green Wire on a 2015 Acura RDX
    To properly test a converter box you will first need to test the wires going into the converter box from the vehicle using a circuit tester such as # 40376. If there is no power on the green input wire then the issue is with the vehicle. Your 2015 Acura RDX may require an additional fuse or relay to make everything fully functional. It looks like under the hood there is a fuse in location 26 that the owners manual just calls trailer. If there is power on the input wires when there is supposed...
    view full answer...
  • Curt Trailer Wiring Harness that Fits 2011 Honda Accord Crosstour
    We have a custom fit Curt trailer wiring harness that fits your 2011 Honda Accord Crosstour with the part # 56008 but the # C56011 is not the correct fit.
    view full answer...
  • My Tail Lights are not Working on my Trailer I'm using the Curt Harness on my 2014 Acura RDX
    You've done a great job troubleshooting. Start by checking the connector from the Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # 118569 or the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # 56008 that controls the running light signal. This will be the brown as you said earlier. Un plug it and check the pins inside it may be that one of them bent the wrong direction and is not giving the appropriate signal to the converter...
    view full answer...
  • Where is Fuse for Trailer Wiring Harness Used on 2008 Acura RDX Installed
    The Tekonsha # 118569 trailer wiring harness you'd looked at isn't a fit for a 2008 Acura RDX, it fits the 2013-2018 model. For your 2008, you'd use either the Curt # 56008 or the Tekonsha # 118500. The 10A fuse included with the Tekonsha # 118500 or the Curt # 56008 installs in the inline fuse holder of the connector that plugs into the vehicle. The additional fuse included with the Tekonsha # 118500 isn't needed for the RDX installation, it's used if you're installing the harness on...
    view full answer...
  • Tow Bar Lighting Recommendation for a 2016 Ford Focus
    For tow bar lighting for your 2016 Ford Focus hatchback you can use the diode kit, # RM-15267, and not have to worry about cutting into the taillight housing. This will splice into your taillight wiring to allow your tow vehicle to control the taillight assemblies of the towed vehicle. This comes with a round 6-way connector that you will install on the front of your towed vehicle and enough coiled wire to go from there to the RV. Since this is a hardwire kit it would not have any fitment...
    view full answer...
  • Tow Bar Wiring that Plugs into Tail Light Wiring on a 2014 Ford Focus
    If your 2014 Ford Focus ST is the 5-door model then you could use Hopkins tow bar wiring harness # HM56008. It also looks like the battery has to be disconnected on your Focus to flat tow it. Consult the owners manual to confirm. To keep a maintenance charge on the battery I recommend using a harness such as # BX88206 with the tow bar wiring you will be using so that you can run a wire from the connector at the front of the truck to the vehicle battery. There are a couple of ways to do...
    view full answer...
  • Will the Hopkins Taillight Wiring Kit for Flat Towing Work on a Vehicle with Disconnected Battery
    The Hopkins Taillight Wiring Kit for Flat Towing part # HM56008 that you referenced and watched the install video for does not draw power from the vehicle it is installed on so the battery being disconnected on your vehicle would not be an issue at all. All of the power it draws comes from the tow vehicle.
    view full answer...
  • Flat Towing Wiring Connections for 2014 Ford Focus with Automatic Transmission
    The white ground wire on a flat-towing harness like # HM56007 or # HM56008 will attach to the towed vehicle's frame or battery negative terminal. This will not have any effect on your Focus' transmission nor will it cause any issues with battery drain. When connected in this manner the ground will still eventually route back to the RV but you do not have to wire it as you describe. Do be sure to follow all of the steps outlined in your Focus owner's manuals for making the car ready for...
    view full answer...

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