Electric brakes on your trailer can avoid the RV pushing your tow vehicle and reduce stopping distance. RVs are heavy, and having electric brakes helps them stop while minimizing strain on the tow vehicle’s brakes. Most RVs use seven-pin connections for the simple fact that they need auxiliary power connections and electric brakes. You’re more likely to see four-pin connections on smaller trailers that don’t require the use of electric brakes or any auxiliary connections. The type of connector on a trailer largely depends on the kind of trailer. You’ll find trailer wiring using both four and seven-pin connectors. Do Most Trailers Use 4- Or 7-Pin Connectors? This can help ensure your food stays cool and you don’t risk spoiling any temperature-sensitive food. It can also allow you to run your refrigerator while you’re traveling. This circuit can charge your RV’s battery while you’re towing. One of the major advantages of a seven-pin connection is the 12-Volt circuit, especially when towing an RV. If your truck or SUV came with a tow package, it likely came with a brake controller. Using the electric trailer brake circuit will require a brake controller installation on your tow vehicle. If you’re using a seven-pin connection, you get all the same benefits but gain a 12-Volt circuit, an electric trailer brake circuit, and reverse lights. ![]() Four-pin trailer connections typically provide basic light functions only for the trailer, including running lights, turn signals, and brake lights. The three-pin difference between a seven-pin and a four-pin trailer connector is significant. The Difference Between 7 & 4 Pin Connectors Your tow vehicle will generate the power necessary to use these items on your trailer. This can include lights, turn signals, and even electric brakes. When you connect your trailer wiring to your tow vehicle, you’re sending power to various electronics on your trailer. Let’s take a closer look! What Does Trailer Wiring Do? So how do seven-pin and four-pin connectors stack up against each other? ![]() Knowing which type you’re dealing with and their functions is critical. And Yes, I do know the plug on the bumper is upside down before anyone asks.īelow are some pictures of the lid to my fuse box lid (Sorry about the camera flash, I couldn't get a good picture in one try)īTW, I do have the 5th Wheel/Gooseneck Towing Prep Group (AHU) and Towing Technology Group (AAN) and Trailer Tire Pressure Monitors TTPMS (XG9) and Trailer Camera Wiring (XFQ) options on this truck.Plugging in your trailer wiring is an essential part of towing.Īnd, if you’ve towed different trailers, you may notice some trailers have different wiring systems. If you have any suggestions or ideas I would greatly appreciate it. I think they are on something and don't want to share. 1) Vehicle hasn't been flashed to give me that feature. I called 2 different Ram Service Departments, Ha Ha. I have checked the fuse box by the drivers side battery (I had to press all the fuses in further as they were barely pushed into slots) and can't find a fuse labeled for that. I have checked them both with the truck running and turned off. I have checked both the bumper and bed connectors. All the other pins are active and working normally. For some reason I can't get any power/12 volt on Pin Number 4 in the 7 way trailer connectors. ![]() I have a new 2020 Ram Longhorn CC DRW 8 Ft Box.
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