- Listen for a grinding, squeaking, or humming noise.
- Check for excessive play in the bearing.
- Look for signs of wear or damage to the bearing.
- Feel the bearing for any abnormal vibrations.
How to tell if it is a bad alternator:
- Check if the battery light on the dashboard is illuminated.
- Test the voltage output of the alternator with a multimeter.
- Check for any unusual noises coming from the alternator.
- Look for signs of wear or damage to the alternator.
How to tell if it is a bad serpentine belt:
- Look for signs of wear or damage to the belt, such as cracks, fraying, or excessive stretching.
- Check the tension of the belt.
- Listen for any unusual noises coming from the belt.
- If you can move the serpentine belt an inch to an inch and a half with light force, it is in need of tightening or replacement.
How to tell if it is a bad A/C compressor belt:
- Check the belt for signs of wear and tear.
- Listen for any unusual noises coming from the compressor.
- Feel the compressor to see if it is vibrating excessively.
- If the belt is squeaking, you can try tightening the belt. You will need a wrench and a pry bar to do this.
