Question about Cars & Trucks
New battery was fitted this febuary
Put an amp meter in the earth wire to the battery and see what current is being drawn out with everything switched off. batteries will self discharge through faulty cells so have a load test done on the battery to check for condition.
Posted on Nov 14, 2014
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Posted on Jan 02, 2017
I stated "such as a light " there are many, many other causes of 12 volt drains such as a seat switch that might hang up and stick. Empty that battery overnight. First install a 9V Battery Radio memory / and clock or you will have to reset both. Disconnect BLACK negative cable of battery. Using a 12V testlight, connect one end to the disconnected cable, and the other to the negative battery terinal. It should light. Remove the 20A BODY and LIGHTER fuse first . This will eliminate the courtesy light circuit . If light goes off the drain is on that circuit. STILL LIT ? drain is on another circuit. Start by eliminating fuses. Hope this helps.
Posted on Apr 13, 2009
SOURCE: Battery Draining
Disconnect the stereo and watch the condition of the battery. Most of the time the stereo gets power out of the battery even when engine is off.
Posted on May 26, 2009
SOURCE: Hi, my battery went flat
There is something on ... batteries do die naturally ... about 1 to 2% a month if left alone, but not in three days. Put a volt meter between the + cable and the + post (remove the cable). Observe the amp draw. Remove the fuses one at a time until the reading toes to zero.
If no change ... consider the alternator ... umplug it from the circuit. You could have a fault in the diode bridge.
Posted on Dec 07, 2010
When the car is running check the voltage at the battery. You should see 14 volts. If you see around 12 volts or less the alternator is not charging.
Posted on Jan 17, 2011
SOURCE: i bought an audi a3
With all vehicles using electronic computer management systems, there is always very low consumption of power from the battery, as these systems are running all the time. However even with those systems running you should be able to leave the car parked for a period considerably longer that one week.
As the AA has confirmed that the charge rate is correct from the alternator, I would suspect the replacement battery. Make sure that the size (The amp hour capacity is correct for your vehicle) If it's too small the systems may drain it during the time indicated....
I doubt very much that you have a short circuits in the vehicle, but to be on the safe side take it along to a shop who have an auto electrician and let them carry out the relevant tests.
I suspect the battery.
Posted on Jan 25, 2011
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