1993 Chevrolet Beretta water leak

I am getting water on my floor on my drivers side. Up under neath I see the wiring box at the top left corner when I look way up. When it rains I see water coming down from that wiring harness. I put a good bit of silicon around it. Seems to work for a couple months then it's back again. I don't know how it's getting to the harness on the inside. I pour water down in where the drivers side is and it leaks on the floor. I even siliconed the vent cover and above the vent cover where it comes up to the windshield. It still leaks. Please help. I'm on disability and need help and can't afford a newer car yet. Thanks and God bless you!