The separation between the connections in the 7 pin connecter is VERY SMALL. Almost any damage from compression could cause a short between 2 wires.
If you have any question open the plug and check.
When I replace one I like to make the connection with the screws and then solder them to prevent vibration form causing a problem.
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles