Can I check a car battery with a multimeter and if so what am I looking for to assess it's effectiveness?
I presume you mean inginition on and engine turning?Now turn ignition on, turn on fans, lights, demisters, radio, etc and see that the voltage across the terminals doesn't drop below 12V, with the alternator doing it's job properly you can expect to see anything up to about 14V.
Yep, I'd see what sort of volt drop you get when cranking the engine, so get someone to start it whilst you check, then once it's running check voltage with all accessories on, with gentle revving of engine and alternator doing it;s job you should see around 13-14V really.Nijinski001 said:I presume you mean inginition on and engine turning?Now turn ignition on, turn on fans, lights, demisters, radio, etc and see that the voltage across the terminals doesn't drop below 12V, with the alternator doing it's job properly you can expect to see anything up to about 14V.
Spark123 - A hydrometer isn't much use with a sealed battery is it?
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