I too find it hard to believe that a wire corroded inside the cabin without some other precipitating cause. mustbeaudi gives excellent advice to "challenge it by identifying that deficiency and insisting that it become the covered failure".
There are several known causes of water intrusion into drivers or passengers footwell area that could easily be related to this failure.
1. A-pillar water leak - LR Tech Bulletin LA-501-006 "Water ingress through A-pillar trim attachment holes"
2. Sunroof drain tubes plugged - LR Tech Bulletin LA-501-014 "Water ingress into the cabin"
3. A/C drain tube becomes detached.
4. Lastly, an unbonded body panel seam!? Read here...
Good luck, I hope this info didn't come too late...
There are several known causes of water intrusion into drivers or passengers footwell area that could easily be related to this failure.
1. A-pillar water leak - LR Tech Bulletin LA-501-006 "Water ingress through A-pillar trim attachment holes"
2. Sunroof drain tubes plugged - LR Tech Bulletin LA-501-014 "Water ingress into the cabin"
3. A/C drain tube becomes detached.
4. Lastly, an unbonded body panel seam!? Read here...
Good luck, I hope this info didn't come too late...