Car battery voltage fluctuation while running
WebRarely, more extreme cases of voltage fluctuation can occur when the car battery is disconnected while the engine is running, or when the car receives a jump start. When … WebOct 2, 2024 · 1) The Terrible BCM controlled alternator voltage management. It intentionally sends the voltage very low, under many operating conditions, to try to save a small amount of fuel. This can …
Car battery voltage fluctuation while running
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WebAug 24, 2024 · Alternators are designed to work at a specific voltage, typically between 13-14.5 volts. If your alternator is failing, its voltage may drop below capacity, causing the battery warning light to appear on your … WebApr 5, 2024 · 5,977 Posts. #2 · Aug 19, 2024. Adam: The voltage at the battery should not drop below 12 volts engine off for a healthy battery, and not go above 14.5 when running. You may have a battery or alternator issue. The regulator for the alternator is built into the PCM, so there might be an issue there also. If you are still under the 3/36 warranty ...
WebJul 14, 2024 · Your battery should measure 13.7 to 14.7 volts while driving. If it feels like your car has less power than usual, it may be caused by the following: Old battery: Car … WebWhen the battery is disconnected while the engine is running, its voltage smoothing effect (similar to capacitors) is unavailable and a load dump transient can produce very high voltages as the built-in voltage regulator has been controlling the alternator field current to charge the vehicle battery and although it will attempt to reduce the …
WebNov 12, 2024 · There are three parts to the charging system on newer cars. 1) The alternator (built-in regulator) 2) The wiring 3) The battery We can eliminate three … WebMar 11, 2024 · For my new battery, I keep monitoring the voltage and found that, while driving, the charging voltage is fluctuate between 12v and 14v, as my knowledge, the charging voltage should stable around 14v is best for battery but if it fluctuate, the battery life time may shorter than normal. May I get your advise:
WebMar 23, 2016 · Voltage on a good battery cannot fluctuate between 0.1 and 12 volts. Or even a bad battery. To move instantaneously from 12 to close to zero would mean an instantaneous short on the battery or an open connection. As an instantaneous short would cause the battery to explode, then you must have a bad connection.
WebJun 29, 2024 · You will need to connect a voltmeter to the battery when the car is running and idle. In an ideal situation, the voltage will read somewhere close to 14.4 volts but it will stay at this number and won’t … phillip allsoppWebApr 17, 2024 · wli98122, When testing the voltages for battery/alternator test directly on clean battery terminals when possible. 13.7 V is OK when engine running and … phillip a. mcfillinWebSep 22, 2010 · Joined Sep 30, 2008. 946 Posts. #5 · May 18, 2010. While running, any voltage drop below ~13.5 to ~13.8 indicates a problem. Check voltage at the back of the alternator, at the positive battery post, and at any random fuse while the vehicle is running and see if the voltage varies. phillipa maw fairstoneWebDec 10, 2024 · A small amount of fluctuation is quite normal when driving as long as the voltage fluctuation is between 13 and 15 volts. If it drops or rises outside of this range, … phillip amickWebAug 10, 2024 · Hi, I recently plugged in a voltmeter to help keep an eye on the battery. Something I noticed, that I did not expect, is that the voltage seems to fluctuate while driving its either around 14.4v (i thought it … trylon mnWebJan 7, 2024 · The voltage of a car battery should be between 12.2 to 12.6 volts when the engine is turned off. A fully charged car battery voltage falls between 13.7 and 14.7 … phillip amesWebNov 3, 2024 · That charge fluctuation can also happen while driving, leading to a voltage drop. A replacement battery will set you back around $50 to $250 depending on what size your car needs. For example, a … phillip ames obituary