Why does my Chevy Tahoe have a high voltage reading?
Just a note to those with electrical issues…an item USING power cant draw more VOLTAGE, it can draw more CURRENT only. The alternator responds by supplying more current, if it cant keep up, the voltage DROPS. So a higher voltage would trace to the charging system some how.
Why does the battery gauge go back to 12 volts?
When your gauge read ~12volts and a new battery it went back to 15 volts, the old battery was overloading the alternator with an internal short. At one time I had a battery short bring it down to 9 volts and the computer went nuts. The engine back fired I just made it to a battery shop.
What should the battery gauge read when the engine is not running?
A fully charged battery should read about 12.5 volts when the key is in the ignition and turned partially, but the car’s engine is not running. Step 2 Look at the voltmeter while the engine is running. Readings of 14 to 14.5 volts on the gauge when as a good sign.
What’s the normal voltage reading on a Chevy truck?
The volts will read between 9 and 14 depending on the load. It automatically adjusts. If you look at the gauge there is top dead center line then a line to the left and right of that. I will operate anywhere in between those in normal operation.
What’s the voltage on my 2008 Chevy Tahoe?
My 2008 Tahoe LTZ just started with the voltage staying constant at 15.2-15.4 volts. I took it into the dealer yesterday, and they replaced all the battery cables per a TSB but it did not correct the problem. Then they reprogrammed the Body Control Module and found that it was always reporting that the battery was dead.
When your gauge read ~12volts and a new battery it went back to 15 volts, the old battery was overloading the alternator with an internal short. At one time I had a battery short bring it down to 9 volts and the computer went nuts. The engine back fired I just made it to a battery shop.
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 battery voltage be on GM Truck?
It appears the needle fluctuates between 12 and 15 or volts. The battery gauges on most vehicles I have owned stays around 13 to 14 volts and doesn’t move much unless something that consumes a lot of power is turned on. Mine does this with nothing additional running on the truck other than the radio and a/c.