Question about 2002 Audi TT
I have changed my battery twice due to the car not starting - but the problem persists. However while driving with my lights on - there is no loss of power.
You may have a current draw. it means when ignition is off someload drainning the battery. to check this disconnect the negative and with ign off install an ampmeter between battery terminal and post. it shoul not read more than 0.4 amp. if it does you have a draw. rate me. good luck
Posted on Jan 29, 2009
Two strong possibilities:
One is that the alternator isn't charging the battery. Stick a voltmeter across the battery while the engine is running. If it's showing less than 13-and-a-bit volts, you need to get your alternator seen to. (try this shortly after you've started the engine, and be careful not to rev the engine before taking your meadurement - there are some interesting alternator faults where it won't kick in until it's been spun at speeds above idle, but then appears to work perfectly)
The other is that something isn't switching off properly and is flattening the battery while it is parked. I once had a courtesy light hidden away in a glove box that got stuck on and caused me grief for weeks before I finally spotted it one dark night. You might try disconnecting the battery negative (with the engine stopped) and putting a multimeter on "amps" between the removed negative and it's terminal. View anything over (say) 100 mA with suspicion. You could then try to narrow it down by pulling fuses to see what makes the current go away.
Posted on Jan 29, 2009
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.
Posted on Jan 02, 2017
Tips for a great answer:
Jan 12, 2013 | 2004 Nissan Murano
Jun 22, 2017 | BMW 318 Cars & Trucks
Jul 27, 2011 | 1992 Volvo 240
Jun 25, 2011 | 2004 Chrysler Sebring
Aug 11, 2010 | 2005 Chevrolet Aveo
May 12, 2009 | 2003 Ford Focus
Feb 23, 2009 | 2001 GMC Yukon XL
Dec 30, 2008 | 2001 Nissan Sentra
164 people viewed this question
Usually answered in minutes!