wrote:
bill a wrote:
Possibly a fastener of the siding itself has punctured an NM cable.

bill

Sidenote: all wiring in the garage has been pulled, and the single
wire feeding the lights is fastened to a single stud inside the
garage.

The first thing you do is make sure the shocks are coming from this
source. Kill the power to the wire from the house and see if you're
still getting the shocks. If you are, then suspect a buried service
that you don't know about.

Chip C