Tick, tick tick noise

[newkid]

I started my 89 300 ce this morning, I heard a little tick, tick,tick noise right in front of me. It sounded like turning signal. I checked with the signal light. .It was not on and not turning signal. Few seconds later, the noise gone. I shut off engine and started again. The noise came back and few seconds later gone. Can anyone tell me what is it? Is it a serious problem down the road?