Battery Diagnostics Precision Analyzing Fluctuating Readings

... battery and alternator, the two most common electrical problems in your car or truck! Check out this playlist for more DIY diagnostics tips ... ... Check it out and learn how to diagnose an alternator! For More Info visit us at http://1aau.to/h/b8D/ ⚠ DISCLAIMER: While 1A Auto strives ... Move the plug in connection back and forth while it's running and see if the voltage jumps. it can be a number of things, including out of spec brushes. it is normal. THe computer controls the alternators output. (to save gas). THis is based on the batterys charge, temp, and vehicle electrical ... Seems to be a normal variance between charging/not charging once a battery is essentially full. Your fairly lengthy trip probably gave your ... It is highly likely that the alternator and/or voltage regulator are the problem. '04 330i ZHP - OEM Clears - ///M Strut bar - CoolantSnitch. It's completely normal for voltage to fluctuate based on engine load. If the car needs more power (such as during acceleration), it may dial back the charging ... If the truck was saying 14+ while driving the entire time, there is probably something wrong as the "smart" charging system should only charge ... The issue i'm having is that while driving i'll notice the battery voltage meter drop and the exterior lights will dim significantly. When the batteries need to be charged, the voltage goes up to 14.4v or so, and when it senses they are charged it drops way down, I've seen 12.9 ...