Quote:
Originally Posted by christopherglenn
Try putting the trailer where you want it, chocking the tires, back up a fraction on an inch to press the kingpin against the front of the hitch (and set the brake before getting it out of gear), lower the gear and lift the trailer - not off the hitch, just until the trucks suspension starts to unload, THEN pull the handle and see if it locks open.
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I do the above +hold the trailer break as I pull away. Just dont drive away with the wire still connected.