Please Help trailer suspension problems!!!

[Chamberpains]

I forgot to say last night that the center pin in your trailer cord is also for your ABS. It's the 12 volt feed to the trailer. Does this trailer have ABS? If it does then it's been disconnected or rerouted through a different pin. the guy you bought it from should have told you this. He more than likely had an older truck that didn't have ABS or he's like me and doesn't run ABS so he removed it and rewired around it to use the center pin for something else. Either way the previous owner should have known the center pin was now used for Auxiliary power to the trailer. That's really a dick move if he didn't disclose this to you. But then again it is buyer beware when buying used equipment.