Re: Water intrusion into rear central locking unit and harness...
Lift it out of it's 'hole' and set it on a unopened kitchen trash bag... set it back in the hole and just make sure the sides of the bag come up high enough to create a 'cradle' for the module to sit in...
Or... actually put the module in the trash bag with the harness coming out of the open end...
Cheers!