Hello, I have a G12XL with the Tecumseh OHV. OH120 175007 Ser: 9345E I found the plastic molded plug that plugs onto the key switch began to melt at one pin. This pin is a red wire with a black stripe and comes directly from the AMP meter. Now the AMP meter will not read anything one way or the other. The tractor still starts and runs, and when I put my volt meter on it, it does not appear to be charging. Is this a bad voltage regulator? The key switch shows signs of heat damage at that one pin.... can I chalk my key switch up to being bad and replace it? Any help would be greatly appreciated! Thank you.