You can buy ready-made test plugs but having leads allows doing other checks. Using the ground wire out of the plug while testing the vehicle functions, confirms the ground to the vehicle is intact. The plug works to check that the vehicle socket is wired, and functions are working correctly. And that function will have power on it if I need to find a bad wire in that circuit. Hook the ground wire of the socket to a battery (vehicle not required) negative post with a jumper and use another jumper (with a 20-amp fuse in it) from the positive post to the function I want to check the light on. Wiring or checking a trailer, I plug the trailer cord into the test socket. These test connectors make it easier to wire and trouble shoot alone. I made them up with 18" wires (colored to match the Traditional wiring) and put a label with the function on each wire, so the wire colors really don't matter. Having several trailers and often ending up helping on others I bought a 7-way flat blade plug and socket. Quoting Removed, click Modern View to see Re: Breakaway Switch Wiring in reply to DRussell, 01-31-2022 16:21:00 Looking online, some trailer batteries/breakaway switches come with chargers built in and some do not. My question is will this cause the trailer battery to overcharge or will the voltage regulator/alternator on the truck prevent overcharging? This should charge the battery on the trailer whenever it is hooked to the truck. My question is about hooking a wire from the 12v hot in the distribution box to the positive side of the battery. The negative side of the battery goes to the ground wire in the distribution box. The other goes to the positive side of the battery. One wire goes directly to the trailer brake wire in the distribution box. There are two wires coming off of the breakaway switch. The distribution box has studs for ground, 12v hot, backup/auxiliary, left turn, marker, right turn, and trailer brakes. I'm working on refurbishing this trailer and part of that involves a new trailer electrical plug and distribution box, breakaway switch and battery box on the trailer. Maybe I'll put the new one on and use the old one for a spare.Please educate me. on my rig it is very high and up under the shroud they now put on pins.so it was very hard to get to.ĭon't think I would want it to grab going down the highway while I was pulling. Finally dropped the tail gate to climb in and get a better shot at putting the pin back in and was successful.ĭon't think it was on long enough to do any damage but I think I am going to get a spare AND move the location of the switch. Turned off the battery switch.but then found out as Dan pointed out it is hot wired to the bus. Sent Linda out into the street as we were blocking both lanes in our direction. Tried to put the pin back in but could not. The wire got fouled in something in the bed of the truck Fortunately I was going very slow.but it was still a jolt. For the first time pulling into the storage yard from the street I cranked it too hard and pulled the pin. We returned home last week earlier than planned (3 weeks into a 2 month trip) because we finally sold the house after nine months! Closing on July 25th heading out full time on Aug 7th. I'm not sure whether there was a short or the cause was pulling the pin on the Breakaway Switch? I don't remember seeing anything on this site cautioning the pulling of the pin on the Breakaway Switch but I thought I would pass this along as a warning. Jacked up each wheel and spun each wheel pulling the pin on the Breakaway Switch and thus engaging the brakes which are still working fine. Well it all went well I replaced the Breakaway Switch and completed the wiring. There is no fuse in this circuit so I was concerned that having the brakes energized for what ever time it took the switch to melt may have damaged the electric brakes. It looks like the wiring in the Breakaway Switch melted and in doing so disconnected the Breakaway Switch from the battery. This weekend I was getting ready to move the trailer to a new site and did the normal inspections finding the Breakaway Switch had melted either as a result of pulling the pin two years ago or a short in the Breakaway Switch wiring.įortunately on inspecting the balance of the wiring all was well. Upon purchasing the Edge I moved it to the first trailer site where we intended to keep the trailer for a few years not knowing on setting up I pulled the pin out of the Breakaway Switch so the cable would not be in the way. I bought a M219 Heartland Edge trailer two years ago and have had good experience with it. I want to pass along a recent experience to keep others from this same mistake.
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