After I can run the wiring along the side of the tongue as the top of the tongue will be against the bed. First, you used a nice grommet at only the side of the trailer for the cased wires to run trough. Does anyone know what the colors of the Featherlite trailer … Question In this case, you will need a set of wiring taps and a pair of pliers. Basically, it is another 12V circuit typically used for a reverse light / reverse lockout for trailer brakes. RC Arduino Domino Layer With Bluetooth App Control. By law, trailer lighting must be connected into the tow vehicle's wiring system to provide trailer running lights, turn signals and brake lights. Try to keep it away from the wheels as that’s where most of the road debris will be thrown up. Being SAE certified mechanic, Andrew knows how your vehicle works and how to make it run even smoother. Each light has it’s own ground shown by the white wire that connects directly to the bed on the light brackets. While the basic configuration is a 4-way flat connector that features one female and three male ends, you may come across connectors with up to seven pins for additional functions that require wiring, including electrically actuated brakes, power source for a winch, etc. For length, have the plug extend a couple inches past the end of the hitch so it has a bit of movement when turning, but not tight where it can put strain on the wiring, drag on the ground, or become unplugged. On my boat I take it 1 step further and before I slip on the tubing, I smear some dielectric grease on the soldered joint, then shrink the tube. It has three poles for basic functions (running lights, turn signals, and brake lights) and one pin for the ground. In this case, you can go with one of universal trailer wiring kits the aftermarket offers today. Get it as soon as Wed, Jan 6. Before you tow any trailer, you should make sure it has functional trailer lights. Attach the Ground Wire to the Trailer. Would this cause the wiring to melt in the trailer? They developed a universal trailer connector that has been used on their vehicles since the 1990s. If you are having issues, you may have a bad ground, check the condition of the connector and wire at the vehicle or you may have a bad power wire connection. There is enough access wire at the tilt pivot too. I measured out the hole, used a scriber just to lightly mark the paint and not the steel. Plug it into your vehicle, ensure the brake lights, four way flashers, parking lights, signal lights are working correction. You will also see a Brown wire which is the taillight wire. They also provide the vehicle side connector too which I don’t need as the tow vehicle already has that installed. This also makes it much easier to work on, so if you have a smaller trailer and can do this, I would definitely recommend it. Get it as soon as Thu, Jan 7. followed directions, double checked to make sure, but blinkers don't blink when trailer conected, without trailers work just fine? Just use a larger sized drill bit or step drill and turn it by hand. Strip the wires, solder the connection and add shrink tube. I’ll included a diagram at the end and add if you want to install clearance lights too. To determine how to wire up trailer lights, you need to know whether your vehicle has a factory-installed trailer package and whether a plug-and-play T-connector is available for it on the market. You may need to inspect your vehicle thoroughly or contact the manufacturer’s customer support to ask whether your vehicle is equipped with it and find out its location. SUZCO 25 Foot 4 Wire 4-Flat Trailer Light Wiring Harness Extension Kit, 4-Way Plug 4 Pin Male & Female Extension Connector & Wishbone-Style with 18 Gauge White Ground Wire with SAE J1128. This is a fairly simple setup, no license plate light, or clearance lights. This can be adjusted according to the length of your vehicle’s harness length too. Went camping and came back and the trailer wiring is totally meted. This is just a standard 4 way connector with a ground, parking, and signal or brake lights. Just wire the appropriate wires to the ones described above and then wire the ground to a good ground at the frame. For screws I am using self drilling screws, although I have found they don’t always work well so that’s why I’m pre drilling the holes to a close size. While the basic configuration is a 4-way flat connector that features one female and three male ends, you may come across connectors with up to seven pins for additional functions that require wiring, including electrically actuated brakes, power source for a winch, etc. It’ll sit inside the channel too, so it helps add protection too. Matt Wright. It won't happen initially, but it will when you least want it to. And the third diagram using clearance lights. Insert the wiring into the casing, for the length of the tongue and bed. You must check the trailer manual to see if the wiring is correct, but normally the white wire is called the ground wire, while the brown wire is used for tail lights. As a matter of fact, the aftermarket offers harnesses to join two connectors of any type. On the back side, I have made it a few inches away from the back skirt to reduce the chance from being gather in mud build up or if a hook from a strap is connected to the bed, it won’t clip on the wire accidentally. Trailers longer than 15 feet and heavier than 1,500 lbs must have a brake system – that means another circuit for hydraulic brakes. Connect the wires from the lights to the new wiring. Start by cutting the white wire and attaching it to the trailer frame. If you have a tubing frame, you may consider running the wire inside of that. Thanks for the clear explanation of the trailer wiring schemes. Do the same for the other holes too. Grounding to the trailer will certainly cause issue down the road. Various connectors are available from four to seven pins that allow for the transfer of power for the lighting as well as auxiliary functions such as an electric trailer brake controller, backup lights, or a 12V power supply for a winch or interior trailer lights. Strip the wire end back about a 1/2-inch and insert it into a terminal with a heat shrink tube. Here are two wiring diagrams for the 7 pin ‘N’ type trailer electrical plug. I still have the ground wire installation left. I’m trying to keep the wire clips somewhat closer together to prevent the wire from being caught up on anything. Click on the image below to enlarge it. Beyond that, also apply electrical tape strips just like we did with the wiring around portions of the split casing too. Cut the white wire short enough for attachment to the front of the trailer near the connector plug. Share it with us! Before connecting each wire slide an appropriately sized piece of heat shrink over each wire. Built with quality and strength that will match that of your rig, our truck accessories are custom designed to enhance the appearance and function of your vehicle. Feed the exposed wire into the casing, this will go against the already installed casing and taped up after holding everything together. If there are absolutely no provisions for trailer lights, you are electrically inclined or have a rough idea of how to wire trailer lights, you might consider splicing into your existing wiring. While I’m drilling, I’ll also mark the holes for the wiring which will run through the channeling in the rear. The circuits are for left and right brake lights and running lights. And finally we’re down to testing, ensuring everything works as it should. The license plate light would run off the parking lights, known as the brown wire so you can pull the power supply from either side. 5 way trailer wiring diagram allows basic hookup of the trailer and allows using 3 main lighting functions and 1 extra function that depends on the vehicle: As a rule, 5-Way flat connectors are used for trailers that feature surge brakes or hydraulic brakes. I soldered the extension, used adhesive filled shrink tube to protect it from moisture and matched the existing 18 ga. wire. Ie pins 4 and 1 are reversed and 6 and 7 and 2 and 5. Did you make this project? He is also passionate about truck customization and off-roading, so when it comes to adding some style and functionality to your truck, you can rely on Andrew’s knowledge. To make this tutorial easier to understand, I will be flipping the trailer on it’s side so everything is easily viewable. The green and brown wire goes to the passenger or right side of the vehicle and the yellow and brown goes to the driver or left side of the vehicle. If any paint work or welding is required, I would recommend doing that first before installing the new wiring. I opened up the new connector and it’s wired backwards. Perhaps you want to add clearance lights, extended the plug length at the tongues end, change out the lights or whatever else may need more wires. Again closing the split loop end with electrical tape. If you have a good repair manual, and you should, you can use the wiring diagrams inside to find the correct wire for your trailer wiring. If you run individual white ground wires to all the lights and tie them together, you will never have a ground issue. 1 2 3 4 5 6 7 wiring diagram tailgate ( trailer) sabs 1327 - 1981 1.----- left indicator -----yellow 1 2.----- auxiliary-----blue 3.-----earth-----white Custom wiring is the ideal solution for installing trailer light wiring on your vehicle. One clearance light on each side and then one larger one at the back. Trailer Wiring Diagrams 4 Way Systems. First starting out with a center drill and then finish up with the correct sized drill bit. Note, that this type of 4-pin connector is less common, that 4-pin flat connector. If your utility trailer is starting to show its age, you no doubt have had problems with your lights. Andrew Demaree is Bully’s resident technical writer and automotive expert. As a rule, you can find these connectors on the older trailers and older vehicles built in the U.S. At the moment, neiter tow vehicles nor trailers are equipped with round 4-pin connectors from the factory. Now for the wire and casing, it has been cut longer, especially the casing since there is a few inches of wire coming from the lights. I couldn't find the explanation in 4 more sites I reviewed. When you start cutting big holes in a components, that’s when the structure becomes weaker. On top also helps keep it away from the ground and scrubbing on the road. It looks cleaner and holds onto the casing firmly. Fortunately, almost all wires you need (except for a brake controller wire) connect to your vehicle’s tail light assembly. Let’s see what types of connectors the trailer light wiring industry uses today. Trailer Parts Superstore® offers a huge selection of trailer lighting including exterior running lights, interior lights, reverse lights, license plate lights, reflectors, wiring harnesses, electric plugs & sockets and much more. Let’s see what types of connectors the trailer light wiring industry uses today. Three wires are for the trailer while the last wire is the ground wire. Install an electrical contact loop and the mounting surface may need to be cleaned. You guys helped me a lot. This is the wire for the right stop/turn signal light. Second, the typical consensus on most boating sights is to run the white (ground) wire to every light and connect for their ground. Apart from providing basic functions, this connector has 2 more ports for electric brake control (blue) and 12V power supply (black or red). I like your use of grommets, soldering (instead of crimped connections, yuck! As the name implies, they use four wires to carry out the vital lighting functions. Trailer Light Wiring Basics. This also makes it much easier to work on, so if you have a smaller trailer and can do this, I would definitely recommend it. Again the wires are taped up with the casing. Thanks for the help! So here I have an older trailer which needed some work, along with re-wiring the lights. Video tutorial on how to wire trailer lights. Below is the generic schematic of how the wiring goes. I’ve based it off this wiring setup where it runs up the center and branches out at the end of the bed vs running it on each side. So the ground wire needs to be attached to the bed. … Let’s see what types of connectors the trailer light wiring industry uses today. Be sure to hit that SUBSCRIBE or FOLLOW button! We'll walk you through the wiring process--it's easier than you think! This is the best case scenario, you’ll only need to buy the appropriate wiring harness with the right connectors on each end. Again, been there and done that. Yellow is for the left turn signal and brake light and green is for the right turn signal and brake light. © 2021 BullyUSA.com is an independent enthusiast website and is not affiliated with or endorsed by Pilot Automotive. 12N 7pin Trailer & Caravan Lighting Wiring Diagram from Western Towing – www.westerntowing.co.uk This is the standard UK wiring of a the normal socket and plug otherwise known as 12N. The first diagram is a simple set up of two brake lights, two indicators and two side lights. The reason for the longer wire is that if anything were need to be adjusted, we have an extra 6 inches easily for any modifications. A custom wiring harness or 'T-connector' is a vehicle-specific harness that plugs in without any spicing required and provides a standard connector output, such as a 4-way flat. Slide the heat shrink over the join and apply heat to seal. The extra wire, as a rule, is used to power backup lights. The trailer wiring diagram shows this wire going to all the lights and brakes. Reply Trailer Wiring Diagrams Trailer Wiring Connectors. The fifth wire (blue) is meant for reverse lights; this connection is needed to disconnect the hydraulic trailer coupler or actuator when the vehicle is backing up, thus deactivating the brakes on a trailer. This is accomplished by tapping into the tow vehicle's electrical harness to transfer power to the trailer wiring system. Now to flip the trailer on it’s wheels again, I need to do the opposite side that was sitting on the ground. These loops hold the wiring snug, so I was able to leave access wire on the tilt lock so there’s no interference. Using a self drill screw with a pre-drilled hole, ensure there is enough wire if you are working with a tilt trailer. You can see the wire is fully cased in poly split loop, have a sufficient amount of loops to hold the wiring in place and prevent it from hanging down. If your vehicle came prewired for towing, it may have a factory trailer harness connection (USCAR connector) in the rear bumper. The wiring will also need to clear the lock for the tilt. I applaud you in some respect and have some issue with others. LED lights had been installed on this trailer about a year ago. Many trailers have three circuits. As for the wiring diagrams, here is a couple different versions to go with. If your late model car, truck, or SUV does not have a trailer package from the factory, you may go with a T-connector made specifically for your make and model. But you didn't use a grommet at other locations that are just as prone to chaffing through he casing and insulation and short. Careful when tightening up these screws, they can twist the loop, so take your time with power tools or use a screwdriver for tightening. Even if your vehicle is not equipped with a connector, it may have a wiring plug located in the rear. Now that you know the types of connectors, you have to determine what you have on your vehicle to make the connection to a trailer. Connect each colour wire on a light to the corresponding wire of the same colour on the trailer wiring. If you own an older vehicle, chances are it will have neither trailer package factory installed nor T-connectors available for it. 4 pin trailer light wiring diagram : 4-Pin Connectors. Be sure to check with your local laws … A colour coded trailer plug wiring guide to help you require your plugs and sockets. CM Trailer Equipment are a leading distributor of high quality trailer parts and components to the light trailer building industry in New Zealand. In order to hold the wiring in place, cable ties can be used but I’d rather have something a little more durable and cleaner. When it is plugged, it disengages hydraulic trailer actuator when you reverse, so the trailer brakes are off at that moment. I have wired lots of trailers and I like using the split loom myself. Use a center drill as a pilot hole and then select the correct size for the split casing. Drill the hole for the grommet using the step drill. Depending on the model, the location may vary from inside of trunk to under the rear floor panel. For the ground wire, I had to extend this. 3 years ago, Thank you for the kind words and sharing your tips as well :). This is the most common scenario. Stay up to date with my latest tutorials, don't forget to FOLLOW my profile and be sure to check out my YOUTUBE page as well for all your DIY needs. I have already removed what was left of the old wiring and will be installing everything new except lights. I believe there is about 25ft of wiring which should be plenty for a trailer of this size. 4-Way trailer connectors are typically used on small trailers such as boat, snowmobile, utility and other trailers that that do not use brakes. Testing the wiring for trailer lights. These too would run off the brown or parking light wiring, same as the license plate light. It will help to have an understanding of trailer light systems and we recommend reviewing trailer wiring diagrams before starting this project. You don't want your left turn signal to be your right or your brake lights to be your running lights. This is a fairly simple setup, no license plate light, or clearance lights. Because installation works related to electricity scary many vehicle owners away, they prefer the experts at trailer shops to have the job done for them instead of trying to figure out how things work. This is a must considering the wiring will be on the underside of the trailer and is exposed to moisture, gravel, maybe salt from winter, road grim, and anything else that could damage the insulation on the wiring. When installing your lights, you may need to run a test and refer to their diagram. Once at the end of the bed, insert the wire in the casing, this will be ran to the driver’s side. 4.6 out of 5 stars 1,292. SUZCO 25 Foot 4 Wire 4-Flat Trailer Light Wiring Harness Extension Kit, 4-Way Plug 4 Pin Male & Female Extension Connector & Wishbone-Style with 18 Gauge White Ground Wire with SAE J1128. Next I have 1/4” diameter, 25ft in length poly split loom casing to protect the wiring. $12.99 $ 12. Before you can get any trailer lights working, you'll need to know what wire does what. Many modern tow-capable trucks and SUVs, especially those by the Big Three, come equipped with trailer packages from the factory as part of the USCAR program. About: Car enthusiast YouTuber creating helpful tutorial videos on both repairs and customizations. Click on the image below to enlarge it. The second diagram shows two brake lights, two indicators, two side lights and a fog light. This will keep debris out of the casing and prevent the wiring from popping out. Your new harness will tell you which wire is for what. You can be assured that we have the right parts to suit your requirements - Phone: 03 308 9918 an extra pin allows using another extra function. On the vehicle side, there will be a female connector, while the trailer/RV harness will have a male connector. If you want to install a license plate light, then just run another extension from the clearance lights. Yellow and green are for left and right turns and braking. 6-Way trailer connectors are used in the following vehicle applications: 6 way wiring diagram is explained in the schematic and table below: 7-Way trailer connectors are used by the following vehicle types: 7 way trailer wiring diagram is explained in details in the picture and the table below: A very good explanation what the black wire in the 7-way connector is for. Browse our selection of trailer hitch wiring harnesses for the one that meets your towing needs. Though trailer lighting systems are available in an array of configurations, the most popular is the 4-way system. 4.6 out of 5 stars 1,292. This organization (United States Council for Automotive Research) united three major American automakers (Chrysler, Ford, and GM) in their intention to advance automotive technologies. Trim off the access wire and casing, remove the wire from the casing and then use the casing for the opposite side.