I’ve been working toward the restoration of my '67 Mustang for a few years now. Last November, as I stored it for the Winter, the Convertible Top worked fine. Now, the Top isn’t working. There’s no power getting to the unit behind the back seat. Over the Winter, I worked in the engine compartment, and moved wires around. I understand that the unit gets it’s power from the starter relay, but am unable to trace the wire. Can someone advise me on how to proceed? thanks, Joe