Detail: A few weeks ago my car (2000 Volvo S70) wouldn't start. When I turned the key, the dash board lights came on, it started clicking, but it wouldn't turn over. Up till then, I had no indications of a weak battery. I had it jumped, and it ran/started successfully for a few weeks. I drove it last night without any problems, but today, again, it wouldn't start. How do I know if it's a battery problem or a bad generator or something else? The battery is 3-4 years old, and the car has ~90K miles. I attached a voltmeter to the battery after the first jumpstart, and it read 11.99. I didn't check this time.
Solution: Usually multiple clicking (like a machine gun) does indicate lw battery voltage. did you get 11.9 volts with it running or car off? with running you should be over 13.6 min up to 14.0 volts. these cars have a fair amount of electronics with some residual voltage draws which may shorten battery life. 4 yrs is not too bad. i would consider replacing battery , I have a 2000 Volvo S70 and I am having the SAME problem. I have taken it to multiple mechanics and no one knows what the problem is. The battery checks out fine, there are no electrical draws on the battery, the alternator is fine, etc, etc. And yet, when I try to start it it won't start. I have to rely on getting jumped everytime I go anywhere. It is infuriating. Please please please someone come up with the answer. , Hi, a 6ya Mechanic can help you resolve that issue over the phone in a minute or two. Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US. click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need. Goodluck!