Quote:
Originally Posted by Rpreme
Sorry for opening an old thread. I felt it was appropriate to post it here.
Since operating charging voltage is 13.7v - 14.0v at idle, my scangauge II is reading 13.5v- 13.6v as of late at idle and under loading.
Is it time to replace my battery?
BTW, the scangauge II is an awesome gauge.
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Trick question, huh? Charging voltage has little to do with battery health, except that poor charging performance will likely kill a battery eventually.
If you want to check battery health, charge it up and find someone to do a load test. If you want to check your charging system, go here:
http://www.teamtoyota4x4.org/archivi.../chasy/ovi.pdf
Idle voltages are not that important. 2000 RPM values are what you want to look at. Always worth cleaning terminals and grounds and inspecting cables.
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