I doubt there would be a staple which, if it did penetrate a single wire, would be grounded on the opposite side of the puncture. If a staple did penetrate a wire, it would have to penetrate a second wire in order to complete a connection to a ground. Pretty sure the only way to blow a fuse is to connect the wire related to that fuse to a grounding point.
OC may be onto something with the idea of checking the junction box, or checking wherever it is that the movable cord becomes a secured point.
At some point during every day you suddenly realize nothing else productive is going to happen the rest of that day. For me, it usually occurs around 9 am.
Vengeance 25V (the Harley needed a home)