Tighten a loose belt on 2006 Dodge Stratus

How do i tighten a loose belt. i think it is a loose belt because i hear a whistling sound. and there a little red light that came on when it first started.

Asked by for the 2006 Dodge Stratus
1 answer
Belts usually make a loud screeching on startup, not a whistle. What does the light look like?