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4-Pole Trailer End Connector

4-Pole Trailer End Connector

Item # 18004
Our Price: $9.81
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Trailer Wiring
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Draw-Tite Trailer Connectors - 18004
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Great Prices for the best trailer wiring from Draw-Tite. 4-Pole Trailer End Connector part number 18004 can be ordered online at or call 1-636-306-4830 for expert service.
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  • Reviews (35)
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Draw-Tite Trailer Wiring - 18004

  • Trailer Connectors
  • Trailer End Connector
  • 4 Flat
  • Plug and Lead
  • 0 - 5 Feet Long
  • Draw-Tite

Tow Ready 4 Way Flat Trailer Connector by Draw-Tite, Hidden Hitch and Reese

  • 12" 4-Pole Trailer Connector, Trailer End

Tow Ready # 118004

118004 4-Pole Trailer End Connector

California residents: click here

Video of 4-Pole Trailer End Connector

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

Video Transcript for Draw-Tite Wiring - Trailer Connectors - 18004 Review

Today, we're going to review part number 18004. This is the Draw Tite 4-Pole Trailer End Connector. This is 12 inches long. It also comes with the 4 wire caps to attach it to the wires on your trailer. Basically, the standard 4-way wires would be the white for the ground, the brown for the tail lights, the yellow for the left turn and brake, and the green for the right turn and brake, so when you go to attach this to your trailer, you do want to test the wires using a tester to make sure you connect the wires function to function, because sometimes the colors will not always match up. A good thing to do is to use a tester that we sell separately on our website that you can use to test the wires and then hook these wires using the included wire caps. That should do it for the review on part number 18004, the Draw-Tite4-Pole Trailer End Connector. .

Customer Satisfaction Score:

Customer Reviews

4-Pole Trailer End Connector - 18004

Average Customer Rating:  4.7 out of 5 stars   (35 Customer Reviews)


Landlord dog chewed up the wire harness and this new has being doing the trick ever since! (Over a year now)


The wiring harness worked great. I used it to connect a back up camera..Instead of fooling around with getting to the back up wires on the tail lights, I just clipped the harness to the wires on the back up camera(one live, one ground) and plugged that into my 4 pole trailer plug in the back of my pickup. when I turn on my headlights. it turns on the camera. It took all of 3 minutes to do that vs God no how long trying to disassemble and reassemble the tail lights to find a backup wire.


Pretty straight forward. I used it to switch my European trailer's connection to be able to connect to my Wrangler's 4-pin trailer hookup.
No issues. works great.

The parts are still on my European trailer and working well! The trailer is a German brand and started its life there in Germany being pulled by my American-spec Jeep Wrangler. The trailer’s wiring and the Jeep’s connections needed to be massaged in order to work. The parts I ordered from etrailer and the writeups for the project on your site made it all possible. Now the trailer is titled and registered in Virginia and enjoying its life on this side of the Pacific!
Aaron - 03/27/2019


received the item in 4 business days, just in time to fix my trailer for commercial lawn service.

Never used wire caps before, they are great. My 4 pole trailer harness actually has 5 wires, to my surprise, and I was able to fit both brown (running lights) in the cap and it works fine. I did wrap it all up with electrical tape to be safe.


The video on installing the trailer hitch was very helpful to me. I was fooled by the Trailer End Connector. I assumed it was the wire connector that I needed to attach to my car, and there was no wiring instruction. So I struck out there. Fortunately I had someone who knew what they were doing help me to wire the proper connector to my car. Your service overall was fast and I did appreciate all the help we received from you. Earl Dekat


Perfect product. Great installation instructions. Now I need European adaptor to fit European trailer lights.


I ordered the Hidden Hitch with a 4 prong flat blade plug-in, the cover and mount for the plug-in, which I installed on an '09 Hummer. The product seems to be well made, it installed easily and to my surprise it was delivered in two days. Thanks


Great value! Exactly like the original harness plug that came with the trailer 12 yrs. ago. Even comes with 4 wire taps to make a secure waterproof connection.


high quality, exactly as described. is a very useful and knowledgeable website.


Great product easy to install don't care for the clips used my own connectors. E Trailer again exceeds all expectations. Thank You


Good plug assembly

Worked very well- good assembly
Ron F - 08/22/2015


The quick connectors made replacing the old bad trailer connection quick and easy.


Needs butt connectors, not splitters.


It did the job, I soldered all of my connections followed by shrink tubing.


I was a little worried about ordering this product because the cost seemed cheap!
After receiving it in the mail I installed it right away and I have to say I am very impressed with the quality of the product.
The entire process from ordering to fast shipping was a great experience. Pricing and shipping was great and I would definitely recommend this store to anyone.


It really was easy to install. And it continues to work well after one year of use.


Exactly what I expected and worked grea t.

No problems. Very happy with the product.
Matthew - 06/05/2019


As ordered and delivered on time.

Working as expected, solid product.
Wayne - 05/28/2017


Installed easily. I used my own butt splice connectors instead of the ones supplied with the plug.


As described Appears to be good quality. Have not yet used.


Fast shipping. Good packaging. Easy to install. Well made. All in all a great buy!


It took a little longer to get than expected, but it arrived in good condition. I have not plugged in the lights to check it out yet. Customer service was great...


The product was excellent and worked to perfection.


Great product. Hasn’t let me down yet!


Seems to be ok but the wire length is much shorter than expected. Will still work fine, just be ware.

Show More Reviews

See what our Experts say about this Draw-Tite Trailer Wiring

  • No Brake Lights with Harness Part # 18004 On a 1998 Chevy Express Van
    The 1998 Chevy van is considered a 3-wire system; it has separate turn signals and brake lights. Using the hardwire unit, 18004, is only tapping into the turn signals meaning you have no brake lights on the trailer. We recommend a custom T-One harness for this van, part #118335. This plugs in behind the taillight assemblies and provides a flat four pole trailer connector which will activate the running lights, turn signals and brake lights on the trailer.
    view full answer...
  • How To Install and What is Wiring Code for a 4-Pole Trailer End Connector 18004
    You will need to use a tester to verify which wire is which on your vehicle. The wire code is: white - ground, brown - tail/running lights, green - right brake and turn, yellow - left brake and turn. I have included a link to a video of installing a similar part on a 1991 Dodge Dynasty.
    view full answer...
  • Wiring a 4 Pole Flat Trailer Connector Part 18004 to Trailer With Split Running Light Circuit
    Typically, a 4-way trailer connector is wired as follows: Green wire for right side directional signal and brake light, yellow wire for left directional and brake, brown for running/marker light, and white for ground. Your trailer has two wires for the marker lights, one to run down the drivers side, one for the passenger. You can use a regular 4-way connector such as our part # 18004, and connect the two wires you have for the running light circuit to the brown wire on the connector.
    view full answer...
  • 4 Pole Trailer Connector with Two Wires Connected to One Pin
    As for the white ground wire that you mention, this wire should be firmly attached to a clean metal surface on the trailer. As the lights are currently working properly, you are most likely picking up the ground connection through the trailer ball. This is a pretty unreliable connection, and can lead to intermittent light malfunctions or failures. Regarding the current connector on the trailer with the two wires running into one pin, some smaller trailers are wired this way. Instead of...
    view full answer...
  • Troubleshooting Trailer Lights Turning off When Brakes are Applied
    What you described sounds like a textbook ground problem. It sounds like the ground is just good enough so that most of the taillight functions work, but when you apply the brakes the ground is not strong enough for that and all of the lights shut off. I would first check the condition of the tail light wiring checking for exposed wire or corrosion and fix as necessary. You should also make sure that if your new tail lights ground through the mounting hardware that the surface they attach...
    view full answer...
  • Trailer Running Light Fuse Location on a 2012 Dodge Ram 3500
    There is most likely a separate fuse and/or relay for the running light circuit on your 2012 Dodge Ram 3500. The easiest way to find any fuses or relays is to use the owners manual and/or legend on the power distribution box lid for the locations of items related to the tow package wiring. From what I could find in the online version of the owners manual, the trailer tow lamps/park lamps fuse is in cavity J14 and requires a blue 20 amp cartridge fuse.
    view full answer...
  • What Circuits do the Wires of the Draw Tite 4-Pole Go To
    The wiring of the 4-Pole # 18004 that you referenced is as follows. White is ground Brown is tail light Yellow is left turn Green is right turn I attached an FAQ on wiring for you to check out also.
    view full answer...
  • Trailer Brake Lights/Turn Signals Do Not Work After Installing Wiring Harness on 1984 Toyota Pickup
    Since you have tested and everything works on the vehicle side the issue must be on the trailer side. But to be sure make sure the harness you installed is properly grounded to a clean and corrosion free bare metal surface and that all the fuses related to the tail lights are good. On the trailer, first make sure the trailer connector is clean and the pins do not have any corrosion on/in them. Then make sure the main trailer connector ground is attached to a clean and corrosion free bare...
    view full answer...
  • Trailer Turn Signals Blink Opposite Only When the Running Lights are Turned On
    It sounds like you have a ground issue. Ground problems show up when there is more load on a system. In this case with the running lights on there is more load on the system when you go to using the turn signals or brakes. You will want to check the main trailer connector ground and the grounds for all of the lights and make sure they are attached to clean and corrosion free bare metal surfaces. Also make sure that the trailer connectors on the trailer and vehicle side are clean and free...
    view full answer...
  • Troubleshooting Trailer Running Light Circuit
    If you have tested the plug on the RV, and each circuit is functioning, then the problem lies either with the trailer connector on the trailer, or in the trailer wiring itself. A loose connection or insufficient ground connection is the most likely culprit. First, check the connector on the trailer, look for any corrosion or damage that would prevent the signal from the running light circuit from getting through to the trailer. Then, make sure the white ground wire from the trailer connector...
    view full answer...
  • Running Lights Stopped Working on Tent Camper
    The spark was most likely an indication of a short circuit that has blown the running light circuit which is why none of the running lights are working. You mentioned the fuses on the truck but if the tent camper is plugged into the truck then there can be separate tow package fuses that you will need to check. Find their locations using the owners manual. You will also want to make sure that the connectors are all clean and corrosion free inside and out. Any and all lights will need to...
    view full answer...
  • Trailer Turn Signals and Brake Lights Do Not Work But Trailer Connector on Toyota Tundra Works
    Since the brake light and turn signal functions are working on the truck side trailer connector, that indicates a problem on the trailer side. The first thing you are going to want to check is the trailer side connector. Make sure that it is clean and free of corrosion inside and out. Then make sure that the main trailer connector ground is attached to a clean and corrosion free bare metal surface. Next you will want to make sure that the grounds for the lights are also attached to clean...
    view full answer...
  • Re-wiring a European Trailer to be Compatible with a 4-Way Flat Connector on a 2008 Ford Explorer
    On a European 7-Way trailer connector, the connector is pinned out differently than those used in the United States. They also use more wires to cover the same functions as a U.S. wiring configuration. So it would be much more beneficial to wire the trailer to work with a U.S. configuration rather than to convert and adapt the existing trailer wiring. A 4-Way trailer connector uses brake light and turn signals on 1 wire for each side, 1 wire for running lights, and 1 wire for ground. What...
    view full answer...
  • Troubleshooting Trailer Lights Going Out When 2004 Ford Taurus Tail Lights are On
    It sounds as if you have a faulty ground connection. This could be the ground connection you installed with the 4-Pole Hardwire Kit, # 18252, or a ground on the trailer. When the tail lights are on the amperage draw is higher and a bad ground connection will appear. Once you check the ground connection for the wiring kit, check the ground at the coupler on the trailer frame, for each trailer light and where any light brackets attach to the trailer frame. Clean all ground points so there...
    view full answer...
  • Troubleshooting Trailer Connector on 2003 Ford Expedition
    If you have tested the pin for the right turn signal at the trailer connector, have you used a circuit tester to probe the wire that feeds the connector? If you get no signal there, you most likely have a blown fuse. Typically, the fuses that protect the towing circuits are located in a fuse box in the engine compartment. Your owners manual should have more specific information about the fuse location.
    view full answer...
  • Working Running Lights, But No Turn Signals or Brake Lights On Trailer
    You will first want to check the fuses on your tow vehicle. Some vehicles could have fuses for operating the turn signals and brake lights of a towing package. You will want to check if they are installed and working properly. The next thing is to make sure the wires on the trailer plug is wired properly to the trailer. If you have a 4-Way connector on the trailer the white wire is for ground, the green wire for right turn and brake, yellow wire for left turn and brake, and the brown wire...
    view full answer...
  • Turn Signals Not Working on Trailer When Connected to 1994 Dodge Dakota With 4-Way Connector
    You will first want to check the fuses on your 1994 Dodge Dakota since it is just the turn signals that are not working. Some vehicles have fuses for operating the turn signals when towing a trailer. You will want to check if they are installed and working properly. If the fuses are all good then you will need to check the trailer connector on the vehicle and trailer for a ground connection issue, or a short on the tail light circuit on the trailer. Open them up and make sure there is...
    view full answer...
  • Diagnosing, Locating and Repairing Trailer Ground Problem
    My suspicion is that you have a poor ground connection somewhere on your trailer. The fact that everything works fine until the running lights are turned on is the dead giveaway. When the tail lights are turned on, the trailer lighting is drawing maximum amperage through the system. If there is a ground problem, this is when it will manifest itself. There are several places to look for a poor ground connection. Lets start with the trailer connector on the vehicle. Trace the white wire...
    view full answer...
  • Only Some LEDs Illuminate on LED-Type Trailer Lights on Boat Trailer
    It sounds as though there is an issue within the one left-side LED light assembly itself. Since LEDs draw so little power it is unlikely that there is an issue with overloading the trailer wiring. If only 7 of the 10 LED elements are now working it is most likely that the problem is in the light fixture itself. LED-type lights do not have user-replaceable elements so it will probably be necessary to replace the entire fixture. Not all LED trailer lights are fully submersible. You definitely...
    view full answer...
  • Diagnosing and Repairing Poor Ground Connection on Trailer
    Everything works okay until you activate the running lights and draw maximum amperage through the system. This is the classic symptom of an insufficient ground connection. Find the main grounding point on the trailer by tracing the white wire from the trailer connector. This wire will usually ground to the trailer tongue. Make sure this connection is tight and that the connection is not corroded. Then check the ground connection for each of the trailer lights. Trailer lamps can ground...
    view full answer...
  • Troubleshooting No Running Lights Functioning on a Trailer While Other Circuits Work
    Based on what you described it sounds like the running light circuit is somehow shorting out between the trailer connector and the light assemblies. A lot of trailer lighting issues are ground related, but since your brake lights are functioning the problem has to be somewhere on the taillight circuit itself. I would start at the connector looking for any corrosion (fix as necessary) and then work your way back from there looking for any cut or exposed wires on the circuit to each light...
    view full answer...
  • Only Right Turn Signal Works on Tow Package Wiring on a 2001 Ford Ranger
    If the wiring harness on your 2001 Ford Ranger is a factory installed harness then there is likely fuses or even relays related to it. The best way to find them is to consult the owners manual for the truck. None of the aftermarket harnesses for the truck have fuses. It could still be a ground issue on the truck. Just make sure that the main ground from the harness is attached to a bare metal surface, no rust or paint. Move the ground if you need to. If you cannot access the truck wiring...
    view full answer...
  • Troubleshooting Brake and Turn Signals Not Working on a Cargo Trailer
    It sounds like the grounds of light assemblies on your trailer aren't strong enough and the additional current required to illuminate the brighter circuit of your assemblies is too much for the current grounds. Check the grounds and make sure they are attached to a clean metal surface, a lot of light assemblies ground through their mounting points. Make sure the lights are attached to a clean metal surface in this case. I attached a couple helpful FAQ's that should help you further if needed.
    view full answer...
  • Left Turn Signal and Hazards Do Not Work on a 1975 Citation Camper and 2010 Chevy Silverado
    Considering the age of the camper you may be dealing with a wiring issue to the lights that are not working. You would need to inspect the wiring and repair or replace any bad or questionable areas. It could also be a poor ground connection somewhere. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light. Make sure that the vehicle side and camper side connectors...
    view full answer...

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