Originally Posted by bobbecky
This actually sounds like there is no controller connected. Without a brake controller to modulate the voltage or provide no voltage when the brakes are not applied, it may be that the full 12 volts are being sent to the brakes.
In the first post, the OP stated, "I wired one hot and one ground to each. Now when a battery is connected or when connected to my truck the brakes are always on...."
It sounds like he bypassed the tow vehicle wiring connection, the umbilical connection on the trailer and wired 12 VDC battery power to one lead and a good ground to the other lead on each brake magnet. If so, then any time the battery is turned on/connected or any time the umbilical is plugged into the truck (charge line on the truck connector) his brakes activate. That is, at least to me, a statement that he "hot wired the brakes to the battery".... I hope he comes back with the solution to his problem and that he hasn't burned up the brake magnets.