Every couple of years I find that the trailer wiring connector (7 pin) on the back of my truck doesn't work properly, causing the brake or turn signals on the trailer to not function. This is caused because the wires and screw-down connection in the plastic housing totally corrode away over the course of 18-24 months. The visible side of the connector often looks ok (below). But, once that entire center section (with all the metal contacts) gets pulled out, you see nothing but corrosion.
Is there a way to solve the corrosion issue? Or, more simply, is there a different style 7-pin connector that doesn't suffer from this problem?