Interior Water Leek?

[Whistle Pig]

My GN is rust free for the most part, Today was the first rain since the new windsheild went in. In the downpoor this morning I saw water leeking from the ecm panel ? would you suspect the windsheild is leaking? TIA Kevin

 

[Roger]

Most likely.
Another possibility would be the drain in the bottom of the heater box is plugged.

 

[1970gsx]

Check the seal where the heater box meets the firewall. Most likely it will be cracked and split. Mine was cracked all the way around. I sealed mine where I could reach with a black sealant adhesive by Permatex (orange tube). Where I couldn't reach(like where it goes down by the fender) I sprayed undercoating (the kind that hardens) down in between. Finally, all my leaks are fixed.