Originally Posted by
dscheidt
You assume it works properly, or that it's capable of actually charging a battery, and not just keeping a battery for self-discharging.
I suspect there's a large draw somewhere, like an aftermarket radio, alarm, or such. Or the battery has failed. I also suspect asking a bunch of bike commuters about fixing your car isn't the best way of doing things.
You're right, there are a lot of assumptions when it comes to diagnosing a vehicle across the internet without sufficient details. We don't even know the year/make/model. It could actually be a problem with the alternator, maybe a bad ground...who knows?
At least he didn't ask the question in the "Living Car-Free" forum.