Hi,
I was looking under the hood and found that I have a wire that is just hanging loose. Are these two wires supposed to be hooked together? Take a look at the picture and let me know your thoughts!!! I'm afraid to just hook them up together....maybe they're not supposed to be??
The gray wire from the rectifier is the signal source for the tach. Yes, you can connect those two gray wires together and possibly make your tach work again.