After reading and taking note of this problem, my car has suffered, it started with the interior lights in the back going off, then the fuel flap give up too, so i've sealed the pollen filter housing. Then i looked for the broken wires under the nsf carpet, hope the photos help, once i found them and the convenience unit i checked inside for water, thankfully it was dry, i crimped the wires back together and BINGO lights back on and fuel flap working again.

More photos.

Good work, looks like you caught it just in time.

I assume you either took the plenum chamber grommets out or cleaned them at the same time?

Nice thread mate, I'm sure others will find it helpful as you aren't the 1st to say they had this problem and couldn't find water or the problem:thumbup: