Just back from the shop where alternator was replaced along with spark plugs and wires.

When engine is warm I hear wobbling noise. I was censerned but decided to check it out later.
The other day battery light came on - the one that in the middle console - orange warning (not in speedo sectoin)
Voltmeter show little over 12V when engine is running. When starting engine battery is weak (Buttery cannot be bad - it was replaced few month back)

I was thinkingh perhaps alternator belt is not tight?
Any ideas suggestions?
Thank you

 

ill lean more to a bad ground wire or battery isn't holding a charge orr there is a voltage leak due to something like the audio or amp being on all the time draining the battery

 

I have read the posts about battery leakage. Since it has been fine till now - can it be that after alternator replacement there is a problem with wiring?