Just like a house fan, if one blade gets burnt off, or the wall socket gets burnt, the house fan wont' work anymore. How to fix? The easiest way is to find the other part it plugs into and cut both plugs off, being sure to note which goes to the correct wire on the other side, and then splice them together, or put new plug ends on both of them. Take to autozone or another auto supply and they can give you want you need if you want to do more than splice the wires back together without using a plug.