Where Should Car Battery Gauge Be. Bought a brand new battery but still my electrical gauge reads only about a 14 output. The alternator how much charging the battery needs and therefore how much.
When your alternator goes out it will be way down toward the lower end. Once the vehicle is started a DVOM should read between 135 to 145 VDC. The ideal car battery voltage with the engine running is between 137 and 147V.
What would make my voltage gauge read low when battery is good.
If the belt seems fine and it is the correct tightness but you are still having issues with the battery gauge jumping then you will have to test the alternator. A fully charged car battery voltage should be 126v or above this is with the engine off. With the engine off you should get a reading of 126 volts. When the battery is low the alternator will produce a little more than 14.
