water on driverside floor and weird lighting problems

[89bmw325ikid]

i dont really know ehere to put this, so if the mods feel its better somewhere else please forgive me cuz im new :)

ok so everytime after it rains i have a ton of water on the driverside floor. along with that, my left blinker stays solid, the inspection light and brake pad warning light stay on and a few of the green lights come on. also all my brake lights in the rear come on. im pretty sure the two things are related but could anyone point me in the right direction? where could the water be coming from? my sunroof does not leak(tested when i got the car with a hose and also a touchless carwash from my work, delta sonic) are there any common places that water gets in on the e30's? any help is appreciated....Nick

[89bmw325ikid]

anybody?

[Sean]

Tail light gaskets?

[89bmw325ikid]

those were leaking but i replaced them. i also cleaned all the oxidation and corrosion from the rear bulb housing(those metal strips) but it only happens when it rains and the water is only on my driverside floor. im going to look around on my firewall and seal up any spots that could be leaking and look for my sunroof drains. if anybody has hints on those please help....Nick

[Mike325]

Usually the sunroof drains go along the A pillar and exit out of the car at the rear of the front wheels. Open your sunroof and look for the drains at the front of the roof. If they don't look clogged, pour some water down the sides and see if the water falls right own and out behind your front wheels. If not, your drain could be clogged or kinked somewhere. Sounds like it might be kinked.

[1991 318is]

Other places.

The windshield gasket.
Cowl air intake. There's a lip around the air inlet in the middle under the area where the vent grilles are. The are drains at the sides and also comes out behind the front wheels. If it can't get out it goes into the A/C heater box. Also the "elepant trunk" hose could be clogged.