The alarm was fitted before I bought the car.... Dont know why it was fitted under a bonnet vent, guess the monkeys saw a space and decided to put it there!!
It now has a tupperware cover over it, lol, its stopped water running onto the unit when washing the car.. however not had car out long enough to test to see if it will melt.
I'll have a word with a few mates and see if there is a reliable auto-electrician locally that could look into the drain for me, as I dont have the time or patience to test every small thing..
Grant