Thread: Battery dead?
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Old 06-02-2020, 07:56 PM   #9
FC
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Join Date: Oct 2003
Carmudgeonly Ride: M5 / 718 GTS / Cooper S / GTI / LR4
Location: Metro Boston
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Quote:
Originally Posted by kognito View Post
After jump starting, alternator output should be 14-14.2 volts. Headlights should be fine running from the alternator, not the battery.

Loose belt can also effect alternator output
I just replaced the belt preemptively a couple of weeks ago. Ironically, I had to pull the battery and it's cradle to get to the belt tensioner. All was fine for a coupe of weeks and a few drives.
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