Question about 1993 Volkswagen Fox
No such thing. If you have a new battery, and the alternator's testing fine then there's obviously something draining the battery.
You'll need a multimeter for this. First off, once started, test the battery voltage at idle. Then increase RPM to about 2000. The idle reading could be as low as 10 Volt(since you just put a massive drain on the battery but should pick up with RPM to aboout 13 Volt at least. It could even go up to 14 Volt.
If that is fine, shut down. Disconnect the neg pole on the battery. Switch your multimetre to Amps(You may have to move one of the meter wires to a current measuring connection on the meter.) Connect the leads between the neg of the battery and the cable that came off it. A reading any larger than 0.5 amps (500mA) could mean trouble. First thing I always check for is trunk and glove compartment lights. They may not be turning off with the lid closed. Next is aftermarket amplifiers. If incorrectly installed it does not shut down and drains the battery in no time at all.
Posted on Jul 09, 2010
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Posted on Jan 02, 2017
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