Car not Cranking on 1995 Lincoln Town Car

Thanks for Answer.
I know source of beep that is because of air bags. But Even
with this beep car started after change heater core, and
I drove for day. But next day car not even cranking and light
from dash board go off when I turn key and after reliesed
key then beep came
Please let me know what could be

Thanks

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2 answers
Clean your battery terminals and cables
Sounds like your Battery is dead, try charging it up.