Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Item # 31345

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Custom Fit Vehicle Wiring

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Hopkins 4 Flat Custom Fit Vehicle Wiring - 31345
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  • Custom Fit
  • Trailer Hitch Wiring
  • Hopkins
  • 4 Flat
  • Powered Converter
Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system. Call 800-298-8924 to order Hopkins custom fit vehicle wiring part number 31345 or order online at etrailer.com. Free expert support on all Hopkins products. Guaranteed Lowest Price and Fastest Shipping for Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.


  • All Info
  • Reviews (29)
  • Q & A (31)
  • Videos (9)
  • Photos
  • Why etrailer?

Hopkins Custom Fit Vehicle Wiring - 31345

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system.


Features:

  • 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
    • Locate connection points in rear cargo area
    • Plug in connector
    • Run hot lead to car battery
  • Includes a tail light converter to ensure that your vehicle's wiring matches that of your trailer
    • Powered module connects directly to battery to avoid overloading vehicle's electrical system
  • Protective connection terminals resist corrosion
  • Comes with dust cap for 4-way flat connector, cable ties, and terminal grease packet for electrical connections


Specs:

  • Maximum amperage:
    • Turn lights: 8 amps per circuit
  • 90-Day limited warranty


Installation

This custom-fit T-connector plugs into your vehicle's wiring harness, which is located in your rear cargo area, on the driver's side and passenger's side. Once you've plugged in the connector, run the red hot lead up to your car battery. Connect the included fuse holder, and then connect the fuse holder to the positive terminal on your battery.


Once installation is complete, the 4-way connector will be stowed in your rear cargo area.


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


Powered Tail Light Converter

A tail light converter is built into this T-connector. This converter is a battery-powered unit that bypasses the electrical routes that are used by a basic wiring harness. As a result, there is virtually no draw on your tail light circuits.


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.



41345 Plug-in Simple Hopkins T-Connector with 4-Pole Trailer Connector



31345 Installation InstructionsInstallation Details 31345 Installation instructions

This Product Fits The Following Vehicles

2003 - 2020 Chevrolet Express Van without factory tow package

2003 - 2020 GMC Savana Van without factory tow package



California residents: click here


Video of Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector


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




Video Transcript for Trailer Wiring Harness Installation - 2007 Chevrolet Express Van

Today on this 2007 Chevrolet Express Van we are going to install Hopkins wiring harness part number 31345. We are going to start the installation off inside the rear cargo area of the Express Van and the ports that we are going to be plugging the wiring harness into are located inside the van basically behind where the tail lights are on both the driver and passenger sides. Starting off over on the driver side with this large connecting port right here we are going to disconnect these two pieces and plug the harness in line and that will be the connection on the driver side. If you look on the top you can see there is a clip holding these two pieces together, push that tab in, pull away the bottom section. 00:45

Then over on the driver side we take the wiring harness, the ports that have the yellow and red wires, they are the ones we are going to plug into on the driver side. Just simply plug that in line to the vehicles connectors. On this side of the harness we also have a white wire which is the ground wire. You can use a self tapping screw and connect into the metal around the area of the ports here but if you look about even with where we just connected the harness end there is a grounding stud that we are going to tap in and connect there. With the ground wire connected we can take and route the passenger side connector over to the passenger side port. Follow up off of the driver side connector and go up and over the door. We can follow the lead of wire there all the way across and make the connection on the passenger side. 01:33

Then the final wire that we have open ended on the harness is the larger gauged red wire. This is the power lead you are going to hook to the larger lead of red wire. We will feed it all the way up to the positive side of the battery. With that stated we can go back up into the cab now and start feeding the wire through the hole that we drilled. Now we will go underneath the vehicle and locate that wire. The hole that we just drilled in the floor board, you will not be able to see when you come underneath the vehicle because it actually comes out hidden behind this opening in this fender so to gain access to it we are going to need to pop out the grommet over on the driver side so once we pull all of the wires through just put a slit in the grommet and that is how the wires are going to feed through. With that stated you can continue pulling the wire through and start routing it up to the front. 02:17

When wiring the power lead from front to back you just want to make sure you avoid any possible hot spots or pinch points that could damage the wire. We have routed the wire up to the engine compartment and what I did previously was to take a light gauged piece of wire and feed it from the top side of the engine compartment down underneath so then I could use it to help pull the wire up and into position. We made our way over to the battery and at this point we need to connect the fuse holder into the positive side of the battery and the other end of it will connect to the wire that we just routed from the back. To do that I am going to pull the fuse out of the fuse holder to assure that we do not accidentally short it out. Then we will disconnect the positive side of the battery. Now with this being a side mount battery trying to ad a electrical terminal to it is going to be difficult so what we are going to do is replace the existing stud with a battery bolt extender. To remove the stud off of the positive terminal just take a flat head screw driver and basically pry this section out. The bolt extender that we are going to install basically will work the same way. We are going to install it inside the housing of battery wire here and thread it into the battery just like it was previously. With that snugged down you can now remove the outside nut. Next we will cut the red wire to length and then attach it to the fuse holder. Reinstall the nut and then tighten that down. Finally we will reinstall the fuse and the installation will be complete.


Customer Reviews

Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 31345

Average Customer Rating:  4.7 out of 5 stars   (29 Customer Reviews)

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system.

- 31345
by:
2015 Ram 3500

Vehicle: 2015 Chevy Express 3500 Extended Wheelbase Passenger (15-pass) Summary: 1 star off for having two wires too short for the extended wheelbase, and the size of the converter that makes placement a little more awkward in the passenger trim than it probably needs to be. Install: Harnesses fit perfectly, plenty of wire for the passenger-side connector to the box. I was able to route it around without issue. There really isn't a good place to mount the box in the passenger van, as the rear HVAC blower is right next to the back corner and the speaker and the wiring for passenger features use most of the factory openings/holes that are shown in the install video. A two-sided sticky pad (3M adhesive pad) would help in this. Same goes for the gasket to route the 4-pin connector. The install video shows a cargo trim with no wiring into the back driver's side door. In the passenger trim that I have (rear window defogger, interior light switch, etc), the rear door wiring already occupies that hole and is a single piece that is the gasket and tubing to the rear door. The 4-pin can fit along with that, but you have to slit along the tubing portion to allow the 4-pin to exit. The connectors for the tail lights don't include a second locking tab, which makes that connection not as robust as the factory connection. Use a zip tie in place of the locking connector. You need more zip-ties than are included. I used about 30, most were for the power wire, but I used two large ones to mount the box. Again, a double-sided adhesive patch like 3M makes would have made this a lot simpler. The wire for the power is at least six feet too short for the extended wheelbase, at least for how I could run it. I followed the routing in the video that goes with the factory wiring - I ran it out with the 4-pin and then followed the factory wiring for the backup sensor. It ends right in front of the driver's seat. I suppose if you were to remove all inside panels and run it in the wall, you might have enough, but I doubt it. The instructions say to avoid heat and moving parts. The best way I found was to use one of the two gaskets right in front of the driver's seat. One is for the parking brake (rectangular), and the other is round. Don't know what it's for. Then you go under the carpet and end up right next to a gasket in the firewall. Punch through that (sealing it up afterward of course), and you're really close to the fuse box. Product: The length from the converter to the 4-pin connector is way too short. It ends up on the side of the vehicle still. Another two to three feet would be ideal to get it to the middle of the underside where the wiring from the trailer would be. The pigtail with the fuse is also a little short. In my vehicle (I imagine that most late-model GM vans are similar), there are several hoses and tubes for A/C and such right above the fuse box where this is supposed to be connected. If the engine is warm, those hoses and tubes are HOT. I would prefer a longer pigtail wire with the fuse further away so it can be placed away from the hot hoses and tubes for when the fuse needs to be checked/replaced. Ideally, the pigtail would be long enough to put the fuse in the passenger compartment near the pedals. Note to GM: maybe you should make more of the fuses more accessible when the engine is hot. Other thoughts: There should really be a 5-pin version of this that includes the backup lights. The GM wiring harness for the tail lights also includes the backup lights, and the harness in this kit passes that through. It would be so easy to just patch into that feed like for the tail/turn lights and pass it into the converter box to facilitate the wiring of a 5-pin or 7-pin/blade trailer wiring. In fact, I'm kinda surprised that something like this doesn't exist as a 7-pin/blade kit. With the backup lights as part of this box, you only need brake and aux power. The aux power could also be part of the converter as well (use 10 awg from engine compartment electrical), and add a brake wire, and that's it. 638905



- 31345
by:

hitch and wiring was easy to install and shipping was fast and in good shape 638797



- 31345
by:

Perfect fit and easy to install 578146



- 31345
by:

This kit made installing the wiring much easier. Beware of tying trailer lights into a computer controlled vehicle without this kit. 572696



- 31345
by:
2004 Chevrolet Express Van

The installation videos were worth their weight in gold, and the actual installation was nearly as easy as the professionals made it seem. I installed mine on a 2004 Chevy Express, and every part fit exactly as described except the zip ties. They were to small to be of any use, and when I tied two of them together to make a longer tie, they snapped under the slightest tension. Over all, it wasn’t a serious setback, they are cheep, and I just used some I had in hand. The included wire designed to run to the battery was about 10 feet too short for my project, but I was installing it on a 15 passenger vehicle. Anything shorter, and the kit would have been perfect as is. Again though, the wire was fairly inexpensive, and available at any auto parts store. All said, generally a good kit that worked well for me. 541231



- 31345
by:
2017 Chevrolet Express Van

The trailer connection device was easy to install no problems. The video on your web site helped me make the right choice. Now i dont have to cut onto the vehicles wires and avoid making a mistake. 504021



- 31345
by:
2017 Chevrolet Express Van

Wiring kit is very complete. It is not yet installed but the parts, instructions and online videos have made me feel like it is going to go very well. Thanks 487380



- 31345
by:

Works like it's supposed too but the harness for the trailer lights was too short. 431255



- 31345
by:

Every thing was just as they said and everyone was very nice and easy to talk to. 409885



- 31345
by:
2015 Chevrolet Express Van

Went together well. You could have added 6 more inches to the 4 way pigtail as I was adding a 7 way to the end of it. I had to mount 2 or 3 inches to the left of where I really would have liked it. Also the red wire to the engine compartment was too short because I have an extented van. I had to splice a peice onto the wire supplied. You should supply enough wire to satisfy both wheelbase lengths. Overall happy...happy that it's done now.....lol 399743



- 31345
by:

This pigtail made my life alot easier. I was dealing with a local installation my uncle had done before I inherited his van. I couldn't get anything to work correctly. So when I came across this part I was totally ready to start over. I love nothing more than a clean installation and this pa rt t made it fool proof. Whoever sat down and made this is a hero. 398709



- 31345
by:
2011 Chevrolet Express Van

Great setup easy install 387808



- 31345
by:

Grate service good parts thanks and free shipping 347092



- 31345
by:

It all worked out like you said . Great product . I'll buy again 331833



- 31345
by:
2016 Chevrolet Express Van

Thanks 325412



- 31345
by:
2015 GMC Savana Van

Great job again 326462



- 31345
by:
1997 Chevrolet Express Van

Order process and delivery are excellent. The only reason for one star less is, that the cable which is going to the battery was too short even though we had the right make and model of car for this kit. It was no big deal but I would expect it to fit perfectly. Other than that it works perfectly and installation was easy. 313213



- 31345
by:
2011 Chevrolet Express Van

Less than a, week to deliver exactly what I needed great company and products 205799



- 31345
by:
2014 Chevrolet Express Van

Wiring harness works great. Everything went together well. Etrailer's customer service is terrific. 198935



- 31345
by:
2006 GMC Savana Van

Made installing trailer wiring very easy on my cargo van which had no factory trailer harness. Plugs-into factory light harness. Connect to the existing ground and run a power wire and it's done. Note: Plan the run for the 4-wire connector and make sure it will reach. I used a factory hole in the left rear door hinge post with a grommet. Just remove the factory 1.25" plastic caplug and carefully push the 4-wire connector through the hole. It is tight, but will fit without re-drilling the hole. 98236



- 31345
by:
2005 Chevrolet Express Van

Exactly what I ordered and needed....fast and friendly service. 63498



- 31345
by:
2004 Chevrolet Express Van

easy to connect, good instructions 53868



- 31345
by:

Exact fits for each vehicle make them a snap to install. Get yours at E-trailer! 46854



- 31345
by:
2012 Chevy Express

Product was exactly as described. I installed this on a 2012 Express 12 passenger van. Although the installation video was for the cargo van, it was extremely helpful. For the passenger van you will need to remove 5 panels, and the rear speaker housing (if you choose to follow the factory wiring). It is easily done and does not require any special tools. The OEM connectors were an exact fit, the wiring bundle to the 4-pole connector could have been about 6" longer and the ground wire could have been about 12" shorter (I cut the ground and crimped a terminal ring), but it did do the job. Total installation time for me was about 90 minutes. overall great product. 43420



- 31345
by:
2010 GMC Savana Van

Works Fantastic! Easy to install. 31540



- 31345
by:
2010 Chevrolet Express Van

The instructions were easy to follow. I wish I had known about the battery terminal adapter--it would have saved me alot of frustration. My fault for not watching the installation video first. Overall, very happy with how easy it was to connect the connectors to the taillight plugs in the back of the van. 26907



- 31345
by:
2006 Chevrolet Express Van

Great product and easy installation which quickly resolved my towing requirements! Great customer service!!! 26335



- 31345
by:

Havent installed yet but quick shipping 24401



- 31345
by:

EASY 2 INSTALL 5774


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Ask the Experts about this Hopkins Custom Fit Vehicle Wiring

Do you have a question about this Custom Fit Vehicle Wiring?


  • Adding a 7-Way Trailer Connector to a 2016 Chevrolet Express 3500 Van
  • We don't have a 7-way to plug directly into the van but I do have an option for you. If your 2016 Chevrolet Express 3500 van had a factory 7-way and it needs to be replaced you can wire in a new one with a harness like # PK11998 and then connect it to a 7-way connector like # A10-7072VP or # HM40975. If there is currently no trailer connector at all you will first need to install a 4-way connector, # 31345. Once you have the 4-way you can use our # ETBC7 kit for a fully functioning...
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  • Trailer Hitch & Wiring for 2018 Chevrolet Express Van 3500 RV Cutaway Chassis
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  • Trailer Wiring Options for a 2008 Chevy Cutaway Van with a Fiberglass Unicell Box
  • The Hopkins # 31345 lighting kit is the correct part for your 2008 Chevy Express Van. You can have the wiring from the box to the 4-Way under your frame but the powered module does need to be mounted in a weatherproof location. Another option for you is the T-One # 118392 which doesn't use a powered module at all. The advantage of this is that you don't have to worry about where to mount the module but the disadvantage is that you don't get the protection to your vehicle wiring like...
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  • Fuse Tap for Installing Prodigy P3 Brake Controller in 2017 Chevy Express Van
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  • Recommended Hitch, Wiring and Brake Controller for 2016 Chevrolet Express Van
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  • Trailer Wiring Recommendation for a 2008 Chevy Express Van
  • Both the trailer wiring harnesses # 31345 and the # 55540 that you referenced have been confirmed to fit your 2008 Chevy Express Van. Both have their pros and cons. The # 31345 only uses the taillight circuits of your vehicle as signal wires and draws all of the power to illuminate your trailer taillights from the vehicle battery. This is a better setup overall that will reduce the risk of over drawing your vehicle's taillight circuits at the cost of a more in-depth install and a little...
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  • Electric Brake Wire Location on a 2005 GMC Savana Van
  • The electric brake wire on the 2005 GMC Savana Van models would be connected in one of two ways. If your van came equipped with a factory 7-Way, then the blue brake wire is already ran from the 7-Way plug in the back of the vehicle and up into the cab. You would not make a connection in the rear of the vehicle. The wire would be located under the dash, near the emergency brake pedal. You will need to hard wire to install a brake controller, as the 2005 Savana vans should not have...
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  • Trailer Wiring Harness on a 2011 Chevrolet Express Van Cutaway Model
  • A standard Chevy Express van using a combined wiring system so the turn and brake signals are on the same circuits. So a wiring harness like the Hopkins, part # 31345, plugs right in and will work fine. However, it sounds like your 2011 Cutaway model has a separate wiring system. In this case the only type of wiring harness I can guarentee a fit for is a universal part like # 119190KIT.
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  • Does the CURT Class V Trailer Hitch # C15320 Include Mounting Hardware
  • Yes, this CURT Class V Hitch # C15320 comes with all the necessary mounting hardware and bolts to install this onto your 2009 GMC Savana Van. Check out the picture I attached that shows all of the hardware. I attached installation instructions for this product for you to check out also. You may be interested in the following products to complete your towing setup: etrailer Ball Mounts # EBMK2216 Plug-N-Tow TM Vehicle Wiring Harness # 31345 (installation video attached)
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  • Is there a Brake Controller Wiring Harness Located Under the Dashboard On a 2008 Chevrolet RV
  • Normally for RV applications there is not a wire bundle located under the dash of the vehicle for brake controller installation. If your RV came with a factory 7-Way at the rear of the vehicle then the Blue wire for the brake feed may be ran and located under the dash to the left of the steering column. You will need to hard wire your brake controller to the stoplight switch, battery, ground and trailer brakes. You will need to use a Circuit tester, part # 40376 if you need one, to determine...
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  • What Is Purpose of Converter on Hopkins Wiring Harness # 31345 For 2003 Chevrolet Express
  • On the Hopkins Plug-N-Tow Wiring Harness, part # 31345, for the 2003 Chevrolet Express, the powered converter is used to supply the power to the trailer lights by being connected directly to the vehicles battery. When drawing the power directly from the battery the converter is bypassing any expensive electrical components that are in your vehicles electrical system. This prevents any damage to those components that could happen if the power was run through your vehicles electrical system. The...
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  • Installation of Wiring Harness on a 2006 Chevrolet Express Van
  • Yes, the Plug-N-Tow (TM) Vehicle Wiring Harness, item # 31345, will plug inline with the taillight wiring behind the taillights of your Chevy Express. You will have to route one wire forward, either along the vehicle frame underneath or along the interior and out through the firewall, to the vehicle positive battery post through an inline fuse. Usually you can find a grommet to run the power wire and trailer connector wire to the outside of the vehicle if you like. When running the wires...
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  • Trailer Wiring Harness Adapter for a 2014 Chevrolet Express Van
  • The 2014 Chevrolet Express Van if equipped with the factory tow package would have come with a US-Car connector which you can see in the attached video at about the 1:30 mark. In order to use this US-Car connector you will need an adapter to go from this to the end of the bumper, the Hopkins Plug-In Simple Wiring Harness part # 41155 for a 4-way or the 7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket part # HM40975 for a 7-way. The 2014 Chevrolet Express Van if not equipped...
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  • Curt Class V Hitch Recommendation for 2006 GMC Savana 3500 Diesel
  • Yes, the CURT Trailer Hitch Receiver # C15320 has a 2 inch hitch opening, has a gross trailer weight rating of 16,000 lbs and will work on your 2006 GMC Savana 3500 diesel. You may also be interested in the following products to complete your towing setup: etrailer.com Ball Mount Kit # EBMK2216 Hopkins Custom Fit Vehicle Wiring # 31345 You should also check the towing capacities of your vehicle and be sure not to exceed the lowest rated component in your towing setup.
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  • Measurements from Bolt Holes Center to Center for the Curt Hitch #13040 2008 for Chevy Express Van
  • I went out into our warehouse and measured one of the Curt Trailer Hitch Receiver, part # 13040, we have in stock and found that the set of bolt holes closest to the receiver opening measured 39-3/4 inches apart, and the set of bolts that are furthest from the receiver opening measure 40 inches apart. Check out the picture to the right if you want to get a clearer picture of these measurements. You may also be interested in the following products to complete your towing setup: Hopkins...
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  • Wiring Harness Options and Installation on a 2003 Chevrolet Express Van
  • There are two trailer wiring harnesses available for your 2003 Chevrolet Express Van if it does not have a factory installed wiring harness. The Hopkins Plug-N-Tow Wiring Harness, # 31345, that you referenced does require the red wire from the input side of the converter box to be ran to the vehicle battery using the included extension wire and inline fuse to work (see photo). The power wire provides power to the converter box which powers the trailer lights. I have provided a link to an...
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  • Is Non-Powered 4-Pole Wiring Harness Safe for Use in 2008 Chevy Express 3500 15-Passenger Van
  • For the 2008 Chevy Express 3500 15-passenger van we do have non-powered 4-pole harnesses # 118392 and # 55540 that are intended to add trailer wiring for vans without the tow package. These simply plug in at the two tail light assemblies to get the necessary lighting signals for the trailer and that lighting power is then drawn through the van's own internal wiring. We also have a powered converter harness # 31345 that uses a separate 12V power connection to the van battery. This provides...
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  • Why Is Powered Module Or Powered Converter Important When Installing Trailer Wiring
  • The powered module or powered converter on a product such as # 31345 is very important to the life of your product, because it reduces strain on the wiring and it helps avoid overloading your Chevrolet Express Van's electrical system. Buying a product with a modulate will enable you to depend on this product and vehicle longer. Not having one will increase the likelihood of more strain on the vehicle and the product.
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  • Troubleshooting Power to Both Running Lights and Left Turn Circuit After Converting 4-Way to 7-Way
  • The Hopkins Plug-In Simple Vehicle Wiring Harness # 31345 that you installed is a confirmed fit for your 2017 Chevy Express Van so we can rule the harness out as the problem. It sounds like you extended the wiring from the 4-Way harness to a 7-Way like the Hopkins # HM48470 that features a 4- and 5-Way connector as well. I recommend making sure that the connections inside the 7-Way match the appropriate functions. It's also possible that there is a short between the running lights circuit...
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  • Trailer Wiring Recommendation for a 2008 Chevy Express Van
  • Both the trailer wiring harnesses you referenced have been confirmed as fits for your 2008 Chevy Express Van. Either would work well but they have their pros and cons. The # 118392 will install much easier but will not have the circuit protection. In the event of a trailer wiring short you may end up popping fuses in your vehicle or damaging the circuits. The # 31345 will be a bit more difficult to install, but it will offer some peace of mind as trailer wiring shorts won't damage...
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  • If Converter Box of Trailer Wiring 31345 Fails Does All of the Trailer Wiring Stop Working
  • If the converter box of the # 31345 fails most likely all of the pins, or some of the pins, will have voltage on them at all times rendering the trailer wiring useless. If the box fails the entire trailer wiring setup stops working.
    view full answer...

  • Converting 4-Pole on 2008 Chevy Express to 4-Pole and 7-Way That Can Be Used Simultaneously
  • Both the 7-way and the 4-pole of the # HM40975 are wired so they'll be active at the same time, but the doors or flaps that cover the plugs are designed in such a way that it's physically impossible to open both at the same time. You can use one or the other, but not both. You can easily install a 7-way, but how you'll proceed will depend on whether or not the trailers you'll be towing have electric brakes or not. If the trailers have brakes, you'll need to install a brake controller...
    view full answer...

  • Installing Hopkins Plug-In Wiring Harness On 2009 Chevrolet Express Van
  • When you are going to test all the functions you will need the motor running so you can make sure everything is installed properly. There is only one ground wire needed when installing this harness. The ground wire you found should have a ring terminal on it and it provides the ground for the converter so that is all you need. I have attached a drawing that shows how the wiring needs to be run when installing the # ETBC7 and a Brake Controller like part # 90195.
    view full answer...

  • Wiring Harness Recommendation for 2003 Chevrolet Express Cargo Van
  • Yes, the Plug-N-Tow Vehicle Wiring Harness, # 31345, can be installed on your 2003 Chevrolet Express Cargo Van. The powered converter on this wiring harness gets the signals from the vehicle wiring system but draws the power to illuminate the lights on the trailer directly from the vehicle battery. I have included a link to our installation video that you may want to check out. Another option would be the T-One Vehicle Wiring Harness, # 118392. This wiring harness simply plugs into your...
    view full answer...

  • Wiring Needed to Install a Brake Controller on a 2017 Chevy Express Van 3500 Without Tow Package
  • We do have a solution for you! Since your 2017 Chevy Express Van doesn't have the factory tow package you will need to start off by installing a 4-Way connector. I recommend the T-One # 118392 if you don't have very many trailer lights or the Hopkins # 31345 if you have quite a few trailer lights. The T-One draws directly off of your OEM wiring while the Hopkins draws power straight from your battery via the included 12V wire. Once the 4-Way is in place you need to install the Universal...
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  • Rebuilding the Suspension and Axles on a Homemade Tandem Axle Car Trailer
  • I do have an option for you but I don't have any way of mixing and matching trailer parts to work on your trailer with custom axles, wheels, and brakes from a 1969 Chevy Nova. If you would like to find a way to modify the Dexter Nev-R-Adjust Electric Trailer Brake Kit part # 23-468-469 to fit your trailer like you did for the axles, wheels, and brakes you have now then you are more than welcome to do so but I won't have any advice for this. The best and only option I have for you is...
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  • Installed Hopkins Custom Fit Vehicle Wiring Harness, # 31345, On 2005 Chevy Express, No Brake Lights
  • You might have a weak ground problem that is causing the brake lights not to work. The three areas where you will want to check to make sure you are getting a good ground is the ground wire from the converter in the wiring harness, the ground wire of the connector on the trailer and the trailer lights are grounded to the trailer. First, you will want to check the white wire on your wiring harness that is coming out of the converter. You want to make sure it is attached to a good,...
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  • How to Test Trailer Wiring Harness with Parking Lights Always On on a 2006 Chevy Express Van
  • It sounds as if your converter is shorted out. To check, you can test the brown wire going into the converter, no trailer connected, with a circuit tester, # 40376 if needed. You should not have power with the tail lights off. Then check the brown wire coming out of the converter, if you have power with the tail lights off then the converter has been shorted somehow and will need to be replaced. If the wiring harness functions normally with no trailer connected, then there is a problem...
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  • Trailer Lights Do Not Work After Installing Trailer Wiring on a 2010 Chevy Express 3500 Van
  • I an 99 percent certain that it is a ground problem. The circuit cannot be completed unless everything is properly grounded including the trailer connectors, the converter box, and all of the lights. Grounds should be attached to clean and corrosion free bare metal surfaces. I have included a link to our wiring FAQ for reference.
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