![]() ![]() Or the bulbs may have burned out, due to many reasons, and they or the fuses simply need to be replaced.Īnother source could rest with either the tow vehicle’s wiring or the trailer’s wiring. The fuses may have blown and have cut off the power supply. Then you should check the fuses and the light bulbs in each of the trailer lights. You have to make sure this wire is connected to an unpainted surface and there is no dirt in the way. One would be that the ground wire is not connected properly or there is some rust and corrosion that has marred the connection. There is a myriad of sources for this situation. What Would Cause Trailer Lights Not To Work? ![]() There is no easy solution to this situation. Or, you may have to replace one or both of the connectors to get all the functions, including the running lights, to work properly. The key to fixing this problem is to test each terminal and then match it up to the function it really operates. This statement is supported by the fact that the middle connection is often labeled as an AUX circuit when in reality, it is not a ground terminal but operates the back up lights. Then when that happens you have to go on a search to find out how the 7-pin wires connect up and to which device they operate. Figuring out what is wrong can be a bit confusing as sometimes the colors do not provide the power to the stated electrical device. This may not be the only source for your problem. This needs you to clean up the connectors and get rid of the corrosion, or you may have to cut and replace wires. If your trailer or caravan has 13-pin electrics on it but your towing vehicle has 7-pin electrics, you will need a converter to connect the two.One of the causes of this problem would be that either the brass connectors or the wiring have corroded in some way. They are more adaptable for detachable towbars as well. This type of electrics is essentially a 2-in-1 socket that has all the capabilities as the twin electrics system in one socket rather than the two separate ones. These are the most modern style of trailer electrics (all EU caravans post-2008 are fitted with 13 pin electrics as standard). ![]() The 12 S type will power everything that the 12 N does, including fog, brake, and sidelights, plus any internal caravan electrics such as fridges and interior lights. ![]() The 12 S sockets are used where you need more power than what a single 7 pin socket can provide. The 12S type 7-pin electrics (also known as twin electrics), is a 2 plug system that combines the single 7 pin 12N electrics socket with a 12 S socket. The single 7-pin operates the left and right indicators, tail lights, sidelights, fog light and brake lights. The 12N towing electrics (also known as single 7-pin electrics) are needed to run the lights on your trailer, caravan, or other towable equipment. You can also watch a video where Glenn explains how to wire a 7-pin plug here. Below we have the wiring diagrams for both a 7 and 13 pin connector. All pins are marked inside and can only be assembled in one way. To help make sure your electrics are working properly, we’ve also designed a one-person, handheld electrics tester to make your job quick and easy!ĭepending on the type of electrics your trailer and towing vehicle have, the wiring inside will be slightly different. The electrics are required to power the lights on your trailer and, if you own a caravan, the internal electrics inside the caravan, therefore it is important to ensure that it is done correctly. One of the most important parts of fitting a towbar to your vehicle is connecting the electrics from the towing vehicle to the trailer or caravan that you are towing. Worklamps/Inspection Lamps/Extension Reels.Ancillary Parts (Spade Terminals, Junction Boxes etc).Trailer Axles, Suspension and Leaf Springs.Miscellaneous Motor Vehicle Accessories.Bumper Protectors, Drop Plates, Spacers etc.Vehicle Towbars, Couplings & Safety Products.COVID-19 Essential Back to Work Products. ![]()
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