That's a very good question, we tend to be extra cautious and say to use 10 gauge wire because that would be more than enough. When you get into longer trailers that will end up using a lot of wire the heavier gauge wire becomes more necessary.…
Typically 4-way wiring consists of 18 and 16 gauge wires. For a 4-way that has all 16 gauge wire you would want the Wesbar 4-Pole Flat Connector #W787264. The part #HM38138 uses 18 gauge for all wires but the white that uses 16 gauge.
A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…
The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…
It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…
Hey Steve, thanks for reaching out! The correct hitch fitment for your 2025 Hyundai Santa Cruz is the Curt Trailer Hitch Receiver #C23WR. If you let me know what you plan on using the hitch for I'd be more than happy to help you out with any…
Hi Rusty; the Dexter #84546UC3-EZ and etrailer #AKHD-5475-35-K will both fit a 3,500 lb axle but they have different bolt patterns. You already ordered the Dexter in the past so I'm assuming your wheels are 5 on 4-1/2. For the same bolt pattern…
Trailer wiring generally uses 16 gauge wire, part #16-1-1. However, with a long trailer like yours you may want to go with a larger like 14 gauge #DW07550-1 or even 12 gauge #12-1-1. Each size is sold by the foot. You will need to have the lights at…
Hey Larry, you are on the right track picking out the correct components to flat tow your 2022 Jeep Gladiator but since your motorhome has air brakes that vehicle will need to have the Air Force One part #SM99243 installed on it which will not work…
Hey David, I've seen reviews of the DeeMaxx #DE86VR fitting, but also others that stated that it won't fit the same mounting hole spacing. We personally haven't had the chance to test this fit out to confirm it yet so I'm more…
Hey Isaac! While we don't have one specific all in one kit we do have every component you will need to update your trailer's lighting and brakes. I recommend using the Trailer Wiring Kit item #ET7WK. This includes a 7-Way connector, a…
Yes, 14 gauge wire seems too small. I would go with 10 or 12 gauge. For 10 gauge you can use #10-1-1 and for 12 gauge use #12-1-1. These wires are sold in increments of 1 foot. So if you needed 20 feet of wire you would enter 20 in the quantity box.…
etrailer.com Has Everything You Need, From Lights to Wiring and ToolsYou could say we’re your one-stop shop. Keeping your trailer lights working properly isn’t just a good way to keep your trailer looking amazing; in most places, it’s also the law. Choose for our collection of tail lights, clearance lights, license plate lights, reflectors, and interior lights. We also have custom-fit vehicle wiring to make sure your trailer lights are working in tandem with your vehicle lights. We have trailer connectors and adapters, wire, wire connectors, mounting brackets, circuit breakers and testers, junction boxes and wiring tools. With over 75 years of assisting our neighbors and customers, over 1 million photos and videos taken to make sure you’re getting exactly what you need, and over 35 thousand installations completed, we’ve got the product know-how and experience to help you make the right choices for the job at hand.What types of trailer lights do I need?You’ll need tail lights, clearance lights, and possibly license plate lights or reflectors, depending on your trailer and local regulations. These lights make sure you’re visible and legal while on the road. For more information on lighting requirements, visit our FAQ.How do I figure out the right wiring harness for my trailer?It depends on what your trailer needs and the type of connector on your vehicle. There are 4-way, 5-way, 6-way, and 7-way harnesses. A 4-way covers basic lights like turn signals and brake lights, while a 7-way adds extra features like reverse lights or electric brakes.How do I install a 4-way trailer wiring harness?First, find a clean metal spot on your trailer frame and attach the ground wire securely with a self-tapping screw—this is super important for everything to work. Next, lay the wires along the frame, making sure they’re out of the way of any sharp edges or moving parts, and secure them with zip ties.Now, connect the harness wires to the trailer light wires. These control the brake lights, turn signals, and tail lights. Use wire connectors to join them, and protect those connections with electrical tape or heat shrink tubing to keep out moisture.Once everything’s connected, plug the harness into your vehicle and test the lights. Make sure the brake, turn signals, and tail lights all work properly. If they do, just go back and secure the wires neatly along the frame, and you’re good to go! Need extra help? Check out our trailer wiring diagrams for a visual guide to get everything set up correctly.My trailer lights aren’t working. What should I check?First, make sure all the ground connections are tight and clean—poor grounding is a common issue. Then check for damaged wires, test the lights with a circuit tester, and try replacing the bulbs. It’s usually one of those!Can I switch from a 4-way to a 7-way connector?Definitely! You’ll need an adapter kit, like the ETBC7. It lets you add functions like electric brakes and reverse lights. Just plug it into your 4-way and wire in the extra features.What is a junction box and how do I use one?A junction box is a small, enclosed hub that organizes and protects trailer wiring connections. It’s where all the wires—like those for lights, brakes, and power—meet and connect to the wiring harness. To use one, mount the box on your trailer frame in an accessible but protected spot. Feed the trailer and harness wires into the box through the openings, then connect the corresponding wires to the labeled terminals or connection points inside (e.g., brake, turn signals, tail lights). Secure the wires with screws or connectors, cover them with the terminal caps or grommets provided, and close the box tightly to keep everything safe from moisture and damage. It’s a handy tool that makes wiring more organized and easier to troubleshoot later!
