If you left the pin attached to the break away controller, your battery that powers that is dead. When the pin is in, the battery is on, so when you disconnect from the towing vehicle, keep the pin out. In order to find out what is functioning properly on a trailer that is going on public roads hauling large animals, take it to an RV service center. You are risking safety by not doing so, reason why I love living in my area, they routinely have roadblocks checking trailers & RV's, from what I have read on here, the states seems to be lacking.
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I think that's where the confusion is. I don't see a pin that pulls out. There's the battery in a box, some wires that run to a piece at the front of the Aframe that the cable connects to. Do you mean that piece?
For what it's worth, I've never heard of having to remove some pin to preserve the battery. While this is my first self owned trailer I've been with people who have had trailers (private owners as well as show barns) and none of them removed anything like what you're saying. They roll the wheel down, disconnect the chains, the breakaway cable and the lights cable and that's it. Are you certain all trailers even have this feature?
You are incorrect about the RV service station. There's an RV dealership that I pass on the way to the barn and they do not service horse trailers in any way. I asked them about the breakaway cable and they had no idea.
I repeat, the battery has a test button that tells you if the battery is dead. It is not dead. The light is green and says charged. Posted via Mobile Device