A "12 Volt" automotive lead-acid battery should show 12.6 Volts, fully charged and disconnected from anything for a half hour.
That same battery, in the car, should show 12.4 - 12.6 at Key: ON and will allow a system charging voltage of 14 - 15.2 Volts, depending on battery condition. If, after startup, system voltage goes to 14.8 - 15.2 it will stay there for some length of time then, as the battery comes back up to full charge, ramp down to 14.2 to 14.6 Volts and stay there. Amperage, which you cannot see, will vary as the state of the electrical loads changes.
After 2005/2006 the charging specifications are much more dynamic so the DIC will show a much greater voltage spread when driving.
Negative terminal to frame is ground to ground - no voltage will result. Red = positive = +, so + to ground will show system (not necessarily battery) voltage - set to Volts DC.
When all else fails, read the directions .......... https://www.google.com/search?q=how....69i57j0l5.10260j0j8&sourceid=chrome&ie=UTF-8
That same battery, in the car, should show 12.4 - 12.6 at Key: ON and will allow a system charging voltage of 14 - 15.2 Volts, depending on battery condition. If, after startup, system voltage goes to 14.8 - 15.2 it will stay there for some length of time then, as the battery comes back up to full charge, ramp down to 14.2 to 14.6 Volts and stay there. Amperage, which you cannot see, will vary as the state of the electrical loads changes.
After 2005/2006 the charging specifications are much more dynamic so the DIC will show a much greater voltage spread when driving.
Negative terminal to frame is ground to ground - no voltage will result. Red = positive = +, so + to ground will show system (not necessarily battery) voltage - set to Volts DC.
When all else fails, read the directions .......... https://www.google.com/search?q=how....69i57j0l5.10260j0j8&sourceid=chrome&ie=UTF-8
