1999 Cadillac Seville Shorting wire and killing my battary

Has the battery been tested, it was not mentioned. To drain it overnight takes a substantial draw. The abs/traction and airbag lights are more than likely not responsible. To do a draw test correctly, requires the use of an ammeter between battery cable connection. The vehicle sits for a minimum 20 minutes, and the measurement is taken. It should be around 20 mA. There is multiple possibilities that cause drains, sticking seat/lumbar switches, relays, etc.