Argyll Posted December 8, 2009 Posted December 8, 2009 I think I have a dodgy battery as I'm having problems starting my car in the morning, particularly after a cold night. This morning I had to bump start it. However during the day it normally starts first time. I’ve just took some readings and the read 12.79 volts when engine not running and 14.69 volts when running. Are these readings okay? Quote
Trev-the-Rev Posted December 8, 2009 Posted December 8, 2009 The charging rate sounds ok. Check your connections and main earth lead and also take a reading when you're cranking the engine. Quote
M13KYF Posted December 8, 2009 Posted December 8, 2009 charging rate means nothing if the battery is still kaput. Quote
Argyll Posted December 8, 2009 Author Posted December 8, 2009 When I turn it at the crank it's dipping to just above 9 volts. Is it fecked or is this right? Someone reckons it should never go below 12 volts even when turning the ignition over. Quote
Trev-the-Rev Posted December 8, 2009 Posted December 8, 2009 Battery has had it by the sound of things. Should hold around 12v when cranking. Quote
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