**WARNING** this is not a good way to check modern cars newer than the year 2000, ie cars with ecu for engine management, can irreversibly damage ECU’s.
I hope you find this helpful. Please be safe working around the car battery. Your feedback is always welcome.
Just took my battery to WalMart to be tested and it tested GOOD. Always have the battery tested to be sure it did fail. It turns out that my noisy alternator may be bad.
NOTE: Just took my jeep to Advance Auto Parts and the tech there told NOT to remove the battery cable, while the engine is running, on any vehicle 2008 and newer. This is because the on-board computer may be damaged. I will be posting this and more into me new video.
Post time: Jul-12-2017