I had purchased a used car and now its Battery always dead. my friend suggest me for cheeking it at "Delta Auto Care". Any body have any other suggestion.
Answers (2)
Put a charger on it and see if it will take a charge. If it takes a charge and holds it, it's a good battery. Next you measure the voltage with the engine running. It should be 14 to 15 volts, going up when you idle faster. If not then you have a failure in the charging circuit and the clerk at the auto parts store can test that for you.