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Mustang_289 · 12-14-2005, 07:50 AM

This is always how I've determined whether a battery is failing or not. If 14v across the battery terminals told me the alt is doing it's thing. Then I replace the battery we've done in our stang.

My son and I decided to take the rear battery wiring out of the equation and temporally moved the battery back up front and wired it up OEM style. Same low below 13v when car is running.

12-14-2005, 07:50 AM	#2
Mustang_289 Registered Member Join Date: Sep 2001 Posts: 512	Re: voltage across battery when charging ? This is always how I've determined whether a battery is failing or not. If 14v across the battery terminals told me the alt is doing it's thing. Then I replace the battery we've done in our stang. My son and I decided to take the rear battery wiring out of the equation and temporally moved the battery back up front and wired it up OEM style. Same low below 13v when car is running.