I started my car and heard a noise and looked down and my battery light came on and said check gages when I looked under the hood my serpentine belt was off. What would cause that?
faulty belt tensioner or the belt broke.
Bad belt or bad tensioner I'd guess. Check all the pulleys to make sure nothing is seized or has noisy bearings.
Check to see that all pulleys that the belt runs on are free and the bearings are smooth and tight. Pay particular attention to the A/C compressor pulley and bearing and the tensioner. Also check to see that the a/c compressor is not locked up.
The belt was old and they don't last forever, time to put a new one on !
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