What voltage should the voltmeter read?
A fully charged battery will typically display a voltmeter reading of about 12.6 to 12.8 volts. If your voltmeter is showing a voltage anywhere between 12.4 and 12.8, that means your battery is in good shape. Any voltage above 12.9 volts is a good indicator that your battery has excessive voltage.
Why does my voltage guage only show 9-10 volts?
My voltage guage usually points near the red mark at 9-10 volts. Batteries cranks the starter quickly and it does not seem to lack any electric power. Some times driving, it will raise to about 12 V, but never above, and the next minut point at 9 again.
What should the voltage be on a truck?
You want 12.4v -13v at the battery with 12.8v being ideal with the engine off. x3, load test the batteries one at a time first. Is the tach behaving nicely? or erratic?
What causes the idle voltage on a GMC Yukon?
Items that affect the vehicle’s electrical system current and voltage at idle are the number of electrical loads being used, including add-on accessories, and extended idle times.
What should the voltmeter be on a GM Truck?
Some of these vehicles have a “tow/haul feature.” When this feature is enabled, the charging system bypasses the economy mode and the generator output should be in the 13.9 to 15.5 volts range, depending on the stat of charge of the battery and the battery temperature. simply turn on the vehicle’s headlights.
What’s the battery voltage on my GM 05?
My 05 does the same thing with a new alternator and battery. In the city it is around 14 volts, when I get on the highway it drops to 11-12 volts. If I put all 4 windows up at the same time the lights dim for a second and then the voltage goes up to 14-15 volts.
What should the voltage be on my truck battery?
Mine does this with nothing additional running on the truck other than the radio and a/c. This morning the needle was about 1 volt below (13 volts) the middle mark (14 volts) on the gauge. I noticed it, turned the truck off, restarted the truck and the needle went about 1 volt above (15 volts) the middle mark of 14 volts.
My voltage guage usually points near the red mark at 9-10 volts. Batteries cranks the starter quickly and it does not seem to lack any electric power. Some times driving, it will raise to about 12 V, but never above, and the next minut point at 9 again.