So I've been having trouble with getting water (sometimes in torrents) under my passenger-side dash on my 1996 Hardbody. This only happens when the AC is on, and only when it's been on for a while (10 minutes or more).What makes this stranger, though, is that the water usually doesn't come until I turn the steering wheel left/right. Then I hear an ice crackling/metal creaking sound, and the water starts flowing. Even if I turn the truck off and come back later, it's likely to do the same thing when I make a sharp turn.
When I had it at the dealership for different work, I had them check the drain -- clear. They were perplexed and told me, for a 13-year-old truck, that I shouldn't worry about it, because finding the problem would be prohibitively expensive. This may be so, but it's becoming a real pain in the hot, humid summer. The carpet is perpetually damp these days. 
Anyone have any idea what this might be? It seems like it must be condensation-related, but I don't get what turning would have to do with it.
