motor dies, head lights shut down when using turn signal, no signals working

I noticed a few months ago that the engine was sometimes slow to turn over, like a drained battery, but then would speed up and crank after a second on two. A few weeks ago the car cut out and died as if the key had been turned off going over the tracks and again on a turn. Today it was running parked with the headlights on. I turned the turn signal and the killed the engine. It did start again but did not repeat. I notice that I now have no turn signals. Is the flasher out, the ingnition switch or perhaps a grounding issue?