I just bought a 90 si hatch. its leaking water through somewhere under the dash behind/underneath the glove box. The wierd thing is it only leaks when i turn on the defroster when its raining out. I ran the defroster/heat the day i bought it and it wasnt raining, and no leak. But today its pouring and i ran it while i was driving and it just kept leaking under the glove box. Im not sure what it is or what it could be. Any help/info is appreciated.