Have you tried disassembling it and cleaning/tweaking the contact points? They seem to be fairly common electronic spade type connectors. There's actually a special tool made to individually remove each connector from the plastic base. They're usually pressed in and are held in place by barbs on the metal that snag the plastic. The tool depresses the barbs allowing them to be slipped out. Once removed, new connectors can be soldered to the wires and pressed back in to the plastic. A good electronics shop should be able to help you, as they more than likely would have the removal tool and the proper replacement connectors. Since cars are full of plastic electrical plugs, a repair shop specializing in automobile electrics may be able to help also. This video shows a different type of connector, but you can get an idea on how the tool works.
https://youtu.be/7orqGTmbOmY