The voltage needle is bouncing. The batteries have been checked. The alternator has been checked. They are all good, any ideas? Thanks for any help.

SOURCE: insalation of serpentine belt 98 chevy cavelier

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c1528003cb79

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c1528003ca13


Here are instructions and routings for belts hope this helps.

SOURCE: flashing dash lights and gauges

Your Body Control Module could be going bad.

SOURCE: 2008 Chevrolet Aveo5-Serpentine belt change

Stick a 1/2 inch ratchet or breaker bar into the square slot in the arm and turn.

SOURCE: severe whistling noise at idle,acceleration.

Have the codes read to see if they are related. Make sure the belt is the correct length. Inspect the pulleys and bearings for failure, also you can look at the entire system an see if there is an alignment issue.

SOURCE: 2003 Chevy Suburban, Alternator failed,

I would look for a short in the output wiring at the alternator. My nephew had an intermittent charging problem and I took the car to an autoparts store and had them check the alternator output. Most parts stores will do the check for free. Anyway, while it was hooked up and the output was being checked, I fiddled with some of the wires at the alternator to see if it had any effect. It did. I noticed that as I moved the wires around, the output changed. I was able to isolate the problem to a wire that ran inside the plug. I resoldered the wire and that fixed the problem. I'm not saying that your problem is the same, but I would definitely look at a wiring short somewhere. I sympathize, since there is nothing more aggravating than finding the source of some electrical issues. Anyway, I hope this helped and that you find a resolution to your problem. Best wishes.