1997 Taurus Wagon

My soin left the headlights on the other day, the battery died after seven hours. I charged it in the parking lot off of my truck for thirty minutes, then after turning my motor off, (leaving cables connected) the wagon started right up. Now, the dome light flashes ( along in tempo with what sounds like a relay in the dash) The turn signals, e flashers all work fine while this is going on, and get this, it goes through this flashing cycle three times for one minute each time. Could this be a Taurus electrical problem ;). Sorry, gotta make light of it. Oh man, just shoot me.