7 Wire To 4 Wire Trailer Plug. The three additional pins are: trailer brakes, back-up lights and trailer battery charging. If the trailer plug and socket are correctly wired up and connected to the vehicle, then the lights on the vehicle would also not be working if a fuse was blown.
The one problem with most of these kits and prewired installations is that they leave the truck wiring and electrical components vulnerable.
It can be used along with other vehicle electronics to make your trailer even more reliable to operate.
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Strip the wire end back about a. Look at the different caravan parts and accessories and make sure you have what you need for towing and. Trailer wiring is very important to towing safety.