~DJ~ wrote:
Hello. I've mounted a winch and battery on the front of my utility trailer. I would like to keep the battery topped off while driving down the road. The trailer is currently equipped with a flat 4 connector. No trailer brakes. Can I replace it with a 7 pin and just run the charge line to positive side of battery and ground pin to negative side? Or do I need some type of junction box? Thanks for your help. DJ
You don't need anything else. Just use 10ga wire and be sure it has a fuse as close to the point you connect it to the pulling vehicle and another fuse as it meets the trailer battery. These are to be sure a short somewhere in your hookup will isolate your batteries and not overheat any wires. Amperage on the fuses could be from 20A up and doesn't even need to be the same on both ends. You can use any plug setup you want to and wire it to the standard you find with the plugs or not as you choose. If you want to possibly use it with another vehicle to pull it, the standard wiring diagram is probably best. Wiring a separate ground is a good idea as using the hitch as a ground sometimes doesn't give a good connection.
