https://i1349.photobucket.com/albums/p741/MarkSalina/20160508_122029_zpsohafptto.jpg I am not sure what all the connections are. I plugged a tow dolly into the round plug. The dolly has electric brakes but I figured the brakes would not work since I don't appear to have a brake controller. The brakes do come on when I apply the brake or the engine braking is engaged however, the tires slide with the brakes on with no car on the dolly. There is a round plug, a square plug and what appears to be an air line. Is the square plug a duplicate of the round plug? or does it have another function. Is what appears to be an air line for braking? I did not see anything in the manual that addressed three different connections. Thanks, Mark
TRAILERKING said
04:02 PM May 8, 2016
I've seen many without a brake controller(including my own), which someone wired the trailer brake circuit to the brake lights. Therefore it was getting a full 12 volts to the brakes which would just lock up.
LifeBeganInaWinnebago said
04:52 PM May 9, 2016
I did some searching and it does look like the small air line could be for brakes. I guess some RVs use the same air that drives the RV's brakes to operate the trailer brakes. You are probably right about the brake light signal being connected to the electric brakes, I will check it out. Thanks
https://i1349.photobucket.com/albums/p741/MarkSalina/20160508_122029_zpsohafptto.jpg I am not sure what all the connections are. I plugged a tow dolly into the round plug. The dolly has electric brakes but I figured the brakes would not work since I don't appear to have a brake controller. The brakes do come on when I apply the brake or the engine braking is engaged however, the tires slide with the brakes on with no car on the dolly. There is a round plug, a square plug and what appears to be an air line. Is the square plug a duplicate of the round plug? or does it have another function. Is what appears to be an air line for braking? I did not see anything in the manual that addressed three different connections. Thanks, Mark
Mark