I've towed my travel trailer when the battery in my trailer was low. My brake controller would say "check trailer wiring" when I applied the brakes. I only towed it about 15 miles and all trailer lights and the brakes still worked. The brakes might of been a bit soft for the first few miles, but I'm not really sure. I usually barely use them.
I think it's a law that you need enough battery power to apply the trailer brakes for 10-15 secconds incase the trailer becomes disconnected.
Anyone else notice this? Suggestions? How long does it take to recharge the battery via truck? Do you idle the truck for a bit?
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