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Car Battery Voltage Too High

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That is when I had the high volt readings. Last night I read about NOT using the existing blue wire from the comp to the alt and ran a seperate new wire from the battery to the alt. The voltage holds steady at no more than 14.8, at IDLE or at HIGH RPM. I also bypassed the isolator just in case it was “disturbing” things.

Car battery voltage too high.

Battery high voltage. Ask Question Asked 5 years,. 12v socket not tested 18,2v Voltage car on Battery – 12v socket 20v 20v Voltage car, airco, headlights on Battery – 12v socket 20v 20v. Tested it with my power supply and it gave +2 volts readings. Still the car battery would be too high, even with +2 volts wrongly added volts..
Fully charged voltage. A fully charged car battery voltage should be 12.6v or above, this is with the engine off. To get a true voltage reading of the cars battery it is important to measure the voltage after the car has been sat for a period with the engine off, preferably overnight, this provides you with the “car battery open circuit voltage” or also know as the “resting voltage”.
This code is also known as System Voltage High, or in some makes of vehicles, Battery System High. What the P0563 code means. The ECM (engine control module) receives power from the battery even when the vehicle is turned off. This permits data storage and other essential functions.

Car Battery Too high voltage? Um, while driving my car, i was watchin the voltage gauge and it goes crazy between 13 and 16 volts and after a while my speedometer hud turns off.. Then bak on after about 2 seconds.. When im standing still and not moving, the voltage reads over 14 volts at about 15 until i start moving and then…
“My car battery is charging at 15.5 volts. Is the battery bad?” It is not the battery. It a voltage regulation issue. Since I don’t know what type car you have, I don’t know what controls the voltage. It could be an internal regulator in the alter…
The ideal car battery voltage range will provide you with a relevant interval according to which you can measure precisely what the voltage says about the battery’s current charge. A perfect voltage with the engine running is between 13.7 and 14.7V. With the engine off, you should get a reading of 12.6 volts.

So, to answer your question, Yes, 15 volts is too high. Most car alternators, that normally recharge your battery after every start, and provide power while the engine is running, are normally voltage regulated to about 13.8 to 14.0 volts. Up to this voltage and at normal temperatures, the battery will only gas very slightly.
To charge a battery, a charger or your car’s alternator needs to raise the voltage across the battery posts. Normal charging voltage needs to remain below about 14.4 volts, which is the level at.
Q: What is the car battery discharge rate? The chart above lists maximum discharge rates at cold temperatures. The temperature is 0°F or -17.8°C, and the criterion is that the battery be able to deliver current at the CCA rate for 30 seconds with a voltage sag to 1.2V per cell (7.2V for a 12V battery).

12 volts is the standard automotive battery in today’s vehicle and each of the battery has 6 cells with a voltage of 2.1. A fully charged car battery has 12.6 volts. There is a very big difference when a car battery drops even a small amount of voltage. When a car drops, for instance, from 12.6 to 12.0, there will be 75% difference.
But, given that a car battery voltage low enough to reach well beyond 12-volts or high enough to go beyond 12.9, means that the most “ideal” range for proper startups could very well be somewhere within the 12.4/12.9 voltage ranges – 12.6-volts is quite likely to be that.
1. Measure voltage between alternator frame and battery’s negative terminal. More than about 1/10 volt says there’s a “grounding” issue. 2. Some alternators are “single wire”(not counting the frame ground) and produce around 14.5 volts at their output terminal , assuming there’s not much voltage drop between there and the battery.

what does it mean when the battery gauge is near the high voltage red line? When we drive our car the bat gauge is in the normal 11-15 volts range but after a little while of driving its slowly creaps up toward the 18 volts end which is in the red area.
⚫︎If your car battery occupies a very high voltage (above 12.9-volts), it will reach “dead” status sooner than you expect. Again, not to beat the horn too much, the ideal voltage range is somewhere between a 12.4 in voltage and 12.7 in energy—experts take a gamble around 12.6 in voltage and above.
This type of car battery test measures the ability of the battery to produce current. Before you do this test, YourMechanic will test the car battery to be sure that it has at least a 75% charge. Then, the voltage of the battery is measured under a load similar to what it takes to start your car.

Dead 12 Volt Battery Of Voltage Range – Is It Dead As A Car Battery? Voltage is crucial when it comes figuring out whenever a battery is still “good to go” or when a battery is “dead.” But, of course, there is more to the terms than meets the eye—and they all have to do with how much voltage is floating within the cell of the battery.
While the engine is running, use a volt meter to test the voltage across the battery terminals. It should read somewhere between 13.5 volts (DC) and 14,5 volts (DC). This reading would indicate that the alternator is working coirrectly. Check it while the dashboard gauge is reading high, and compare the readings to each other.
Car Battery Voltage Too High – Is It Problem? Danazunove / 19/08/2018 / Comments Off on Car Battery Voltage Too High – Is It Problem? The self-start option is one of the most loved where you will get ease while igniting a car. You just have to turn the key, and it is done. It is very simple, easy and helpful.

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