I think I finally fixed the rain leaking into my '93 Dakota! I recently back flushed the heater coil trying to get more heat, and in the process, I caulked around where the heate hose goes into the firewall. I caulked all of the places where hoses, etc., run through the firewall, and lo and behold, it seems to have stopped the leaks!!

I have been trying many of the things I read on the forum, but this one seems to do the job on my Dakota, so far at least. I'll let you know how it goes from here on...

 

glad to hear it was a cheap and easy fix. hope it doesnt start leaking again