brake light and chime nouse

Tired old KIA, most likely connection issues due to bad wiring, dig out the wiring diagrams and start tracing circuits, repairing as you go.

Look for an electrical plug on the brake master cylinder. This is for the low fluid level sensor. Check the wiring and plug going to that sensor. Sounds like when the wiring or plug gets wet it creates a short and makes you get a false low fluid level warning. When this happens, unplug the wiring from the sensor. If it doesn't go away, the wiring or plug is shorted. But if, when you unplug it the light goes off and the chiming stops, the sensor is bad. Hope that helps! Jim