Hi, First Thing I'd Do Is Charge The battery, Check The Cells With a Hydrometer. Look For A Reading Of 12.75 Or so Battery Is fully charged. Next Check Charging System, Start Engine Put A DVOM Meter, Put On 20 Volt DC Scale, Put Across Battery Cables, With engine Idling, Look For Voltage Of 14.1 Volts Or So. If All That Good Then For The next test, Put Your DVOM Meter On 20 Amps DC. Take The Positive Cable off The Battery. Take One Of Your Test Leads From Your DVOM and put It On The Positive Battery Post, Put The Other Lead From The DVOM To The Positive Battery Cable. Turn On The Meter Read The Amperage. With Nothing On, Should Be About 0.1 To 0.2 Anything Higher Than that, And You have A Draw, On The battery. Open The Door Read the amperage, Now Close The Door. Should Be Lower With the door closed. To Find your Drain, Look For The Easy Things First, Disconnect your Hood Light, Make Sure Your Glove box Light Is out, Check Your Trunk Light, By Disconnected it. As You Do All These things Then, Recheck the Meter, Making sure The door Is closed, Each Time. After Doing All That And You Still Have A Draw, Try Unplugging The voltage Regulator, If That Does Not Lower Your Draw, Than Remove Each Fuse One At A Time, Until The draw Is Gone, Making Sure The Door Is closed Each Time. After Checking With Meter Remember Where Each Fuse Goes, Very Important. When You Find What Circuit The Fuse Has The Draw, It Will Give You A Better Understanding Of What It Controls. Most Cars Today Can Take Up To Twenty Minutes To Get A low Amp reading. Also When Connecting The Amp Meter To the Car Make sure You Have it Set To At Least 20 amps Anything Lower Could Blow Out The Fuse In The DVOM Meter. Also If You get A Minus Reading In Amps Just Reverse The Meter Leads. Make Sure The Car Is Not Running When Doing This Test.
Hope It Could Help You,
Sunday, July 18th, 2010 AT 1:24 PM