Serpentine belt or alternator? -
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Unread 10-03-2013, 01:14 AM   #1
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2008 MK Compass 
Join Date: Jun 2012
Location: San Antonio, Texas
Posts: 4
Serpentine belt or alternator?

I've been hearing a squeal at start up for a week or so, then I noticed that it did it again when taking off from a stop. Two days ago I could kind of feel the Compass "stutter" while driving and my headlights would dim for a second. Tonight the squealing was a lot more frequent and my battery light came on while I was driving. So, I wanted to get y'alls opinion on whether you think my belt might be slipping or my alternator is going out?

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Unread 10-03-2013, 05:26 AM   #2
Web Wheeler
1989 XJ Cherokee 
Join Date: Nov 2011
Location: Chandler, Arizona
Posts: 1,479
Change your belt, 20 bucks and half an hour of time. See if it changes. Your belt is 5+ years old, probably needs to be changed.
89 Cherokee
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Unread 10-03-2013, 05:47 AM   #3
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2006 TJ Wrangler 
Join Date: Jun 2007
Location: Total, Confusion
Posts: 10,028
If it's the original belt, changing it couldn't hurt, and while doing that you'll know if the tension (idler pulley) is working correctly. If the squealing continues or the battery light comes on after that I'd have the alternator tested at a local parts store.
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alternator , serpentine belt

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