Quote:
Originally Posted by busterb
(Post 699184)
Question. If the cold killed the damn thing, how come it lasted all day?
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1) Traditionally, batteries died because they are failing. And the cold further reduces its energy abilities. But lately, I have been seeing batteries fail when they once never did. Suddenly, after driving for over an hour, on a summer day.
2) Yes, the charger system should be confirmed just to avoid another failure. That means using a multimeter when the car is not running, when the engine is idling, and when the engine is revved above 1500 RPM. All measurements done with all heavy power consumers (high beams, heater fan, rear window defogger, etc) all powered on.
A perfectly good charging system is above 13 volts when the engine is running. A defective battery drops to 11 volts. Only way to get a useful answer is to post those numbers.
Battery light only reports a few catastrophic failures. Does not report most charging system failures.
3) Another number. How old is the battery?
4) And finally, twist each wire where it connects to the battery. Those connectors should not move. A problem often created by mechanics (so many failures traceable to humans). The black wire is loose.
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