A 5 pin plug by the blower motor that supplies the ground and power(?) for the blower motor got hot and melted inside. This is not the one that plugs into the blower just one close to it. I know for a fact one of them is the blower motor's ground. I am not 100% sure what the other four wires are. Does anyone know where to find the part numbers and/or replacement parts for this plug or for that matter other under hood harness plugs?

 

The plug is the blower resistor module. It's possible you could find it at an auto parts store.

 

I've always had great luck going to my loca u-pull-it yard and there is no way a parts store can come close to the usual price I pay...free! Normally, if it is small and not metal they are more than happy to give the stuff away.