Update to this.

Last night I drove home in the dark, lights on radio blasting.

Then after I parked it I went to start it again to test out this weird clutch problem I am having and battery was too low to turn starter fast enough.


MORE:

I charged the battery overnight.

As I was driving on the freeway today, I noticed the battery light pulsing on and off at roughly 2 pulses per second fading in and out. The faster the RPM, the brighter it pulses. At idle speed, I don't see it.

I checked voltage at idle and it is normal - about 13.5V ish - so can I assume the alternator is working weakly at high RPMs?

Does the battery light actually warn you that the alternator (not the battery) is weak?


So my problem persists. It has been a little over a week since replacing the voltage regulator, which doesn't appear to be the problem. The battery has worked for numerous starts since then, but had apparently gotten weak from the long drive with the headlights on and weak charging.

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