How far or how long was the car driven? If the generator failed, with a new, fully-charged battery, you will get perhaps as much as an hour drive time with two engine starts if the head lights and heater fan are not used. More realistically, you can expect the battery to last about a half hour. This guide can help
https://www.2carpros.com/articles/everything-goes-dead-when-engine-is-cranked
Start by connecting a small battery charger and charging the battery for about two hours at a slow rate. If the engine cranks normally after that and starts, use an inexpensive digital voltmeter to measure the battery's voltage. You must find between 13.75 and 14.75 volts while the engine is running. If it stays near 12.6 volts, the charging system is not working.
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Thursday, February 25th, 2021 AT 3:51 PM