cluck cluck sound near pulleys belts

There is no way to diagnose this over a computer. You're going to need a live person to look at it and see if a pulley is loose or wobbling. The yellow warning light is probably the Check Engine light. That means the Engine Computer detected a problem, set a diagnostic fault code, and turned the light on to tell you. Your mechanic will start by reading and recording that code. If you find out the exact code number and post it in your reply, I can give you an idea of some possible causes.