Faulty Electrical

[Co Rich]

I have a 2004 X5-e53 V6 with an electrical issue. My indicator lights work but the 'ticking' has stopped and there is no indication in the cabin they are working. When I lock my vehicle, I get the audible indicator but my lights no longer flash outside. Additionally, the sunroof & seat warmers no longer work. I have checked every fuse in both behind the glove compartment and in the cargo area; there are all good. I suspect some sort of short somewhere as I recently found about 4 inches of water in the right passenger rear wheel-well, from the sunroof run off drain being plugged. Some wires in that area were damp. Any suggestions on how to find the fault?