I think my alternator is bad. When the vehicle is running vom reads about 8.5volts across the battery. When the vehicle is off the vom reads about 10.5volts. The car will start if jumped, but otherwise cranks very slowly. The battery is less then a year old and I notice the voltage goes up over time (batt re-charging itself?)
I notice that no lights come on the dash when I try and crank it. The same occurs when I jump it- no lights come on the dash.

What do you all think?