[bringselpup]

The check engine light would only be lit if you did have an engine malfunction code.

With the clicking from in the dash and the headlights flashing the only thing I would be chasing would be factory alarm issues.

Check for solid electrical connections at the battery and major ground points. Cleaning or tightening a dirty or loose connection has made many a problem go away on a Jeep. Check your door wiring. I wonder if you have a power door lock that isn't operating correctly. These things are notorious for getting faulty wiring inside the rubber boot that sleeves the wiring from the body of the vehicle into the door.