I would have to see the extent of the sparking. Some can be considered normal from low voltage draws at all times.
I watched your video. If the fuse between those two points is good, you would have power on each side and not ground on one of the sides. Remove the fuse and confirm continuity, which I feel won't exist. If there isn't continuity within the fuse, the next step is to replace it and see if it fails again. If it does, then we have a short which could be anywhere. If that is the case, let me know and together we will start eliminating possible issues. Also, if the fuse does fail again, disconnect the battery and remove the fuse box to see if there is anything damaged under it where the connectors are located.
Take care and let me know what you find.
Thursday, January 12th, 2023 AT 6:38 PM