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Sounds like you have a charging system problem like a bad alternator or a loose power lug under the center console on the passenger side (common problem). You will have to jump start the car and have the battery and charging system properly checked. You can see if the alternator is working by checking the battery with a voltmeter. It should read above 13.5 volts with the engine running and accessories off.
ASE Certified Technician
12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes