The first thing you should check is your battery and alternator.
Charge the battery well and then test battery and alternator. Your symptoms could be a weak or dying battery (probably due to a bad alternator).
Battery test. Engine off, headlights on for one minute. Voltage across battery terminals should be 12 to 12.5.
Alternator test. Engine running, voltage across battery terminals should be 14 to 14.5.
Or send it to your friendly Autozone or Advance Auto for a free check.
Then check the Fuse Holder (No. 11) and wiring under the Power Distribution Box next to the battery