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did you read my articles above....   i did post them.. and answered your prior post....

when you log in...   click on my threads...  it will show you where you have posted...

answered posts end up in the active posts section...  

WRONG. Please excuse me Mr. "Master Technician" but I have had the same exact issue with my mazda Rx7 and brought it to a "professional" electrician specifically for cars in New Britain CT and he tested it right in front of me with his multi meter and told me I had a bad alternator. And you know what Mr. "Master Technician"? He was right.

You might want to lay off of with that pretentious attitude until you really know what you are talking about. Any true professional knows that most any issue's that happen a lot of times can be a multitude of things, you can't not always fix something with your preconceived go to cure that usually works 10 out of 10 times. OWNED  

I should say though that I do think it's cool that you share info with others though... Peace  

i do try...   2rotors...    but there are several tests.....   one is an instant test...  where the battery is checked for the percentage of charge....  with a volt meter...    then the car is started....   the charging system tested.. if the charging voltage is over 14 volts..    and then an engine off battery load test is good on the battery..    that tests the charging system...


when you wake up...  and you have been to repair shops that checked the charging system... and your battery is dead overnight..

then you have to do the parasitic draw test.... but with OBD2 devices that take some times 5 minutes or even longer to shut off...  you have to do it the way i describe and is described in the professional articles written for professional automechanics i linked above...

i try to give everybody a fair and accurate answer...  very few go unanswered... unless i totally miss them.. or the are beyond an answer..

peace....

there are also 55 different web sites here... i only cover a dozen or so...  

i have a 1999 dodge durango and i replaced the batter replaced the alternator and got a tune up oil change everything that i need to do to make sure my car is running! but something has been draining my battery for the past couple of days i get a jump my car runs then over night it dies why?  

nothing has been left on...   but on 1996 and newer cars there are many circuits that have timers on them ... they stay on after you shut the car off...  

pick up one of these...  most parts stores sell some variation.. this one comes from harbor freight about 8 bucks..



with this...  you can get out  after shutting off the engine...   unscrew the green knob and it will disconnect the battery..

you should still have a charged battery in the morning ...

there are several articles above ... on how to properly test for parasitic draws...

if you have a digital volt meter.. they start at 8 bucks.. or a test light..    you can with the engine off disconnect one side of the battery...   hook the test light between the post you disconnected the cable from and the cable that was disconnected...  if there is current being used.. the test light will light up....   you can go and start pulling ONE fuse at a time until the light goes out...   its much easier with a digital volt meter hooked properly to both sides of the green knob device shown above..     run the engine.. shut it down..   wait 6 minutes.. loosen the green knob...   examine the digital volt meters reading in 10 or 15 amp DC scale...    if you have more than 0.030 ma   you can then start pulling fuses... there should be fuses under the hood on that model...     one at a time...     there are more fuses inside...    you will probably have to pull the dome light fuse  and then continue the test with the door open and start pulling fuses under the dash...  

i also would like to add that the guy that was working on my car had hooked up the back-gate wiper that the motor had went out on or something all i know is that it does not work and i wanted to know if that could be the source of the draining battery or could it be the tension belt not being tight enough or working properly that would drain my battery over night?  

confusedaboutcars2.:
i also would like to add that the guy that was working on my car had hooked up the back-gate wiper that the motor had went out on or something all i know is that it does not work and i wanted to know if that could be the source of the draining battery or could it be the tension belt not being tight enough or working properly that would drain my battery over night?

both are totally possible... trouble shooting is the only way to know for sure....


if the alternator belt is not properly tensioned....     the voltage at the battery when measured with the engine running will be below 14.1...

how much charge do you have in your battery....

engine off..    headlights on for one minute then turned off...  

12.65 volts is a 100% charged battery
12.45 volts is a 75% charged battery
12.25 volts is a 50% charged battery...

if you have less than about 75% charge...   any draw may discharge the battery overnight...

why am i asking you do use a digital volt meter...   they cost as low as $8 bucks...  and this is 2011...  

thank you for all your help! i had the guy disconnect the back gate wiper and my car stated like it did before that was connected so everything is fine my car stated this morning with no problem.  

hey nick i need help please.... i have a 1988 nissan hard body pick up and it has a brand new starter and battery well now the car will only run about 10 mins then dies u can jump it off and drive about 3 miles and i lose all power and it dies now i wont jump start at all??? is it my alternater??? i think it is but we just had it tested 2 weeks ago and it said it was good please help we have tried 3 batteries and the same thing happens each time it does try to turn over while being jumped off but wont and is turning really hard thank so much  

sorry nick has not logged in since 2008... i don't know what happened to him...

wayne here...

do you have a digital multimeter???  they cost between 8 and 25 bucks..

start the engine.. turn on the headlights..

set digital volt meter to 20 volts DC scale..

1.  test positive battery post to the negative battery post.. 14.1 to 14.8 volts is expected..

2,  test between the Negative battery post and the engine block.. 0.04 volts is expected..

3.. test between the Negative battery post and the body.. 0.02 volts DC is expected..

4.. test between the engine block and the body... 0.02 volts.

this takes less than 2 minutes .. post your results..

if you get more  that 0.02 or 0.04 volts on tests 2, 3, 4...  you have a ground problem...

i would really like you to start with a fully charged battery..

test 2.3 and 4 don't need it.. but they require the engine running and the headlights on...

print this..    note the test results..

try it on a car that works properly..  you will see how the test works...  

CAN ANYONE HELP ME????
I HAVE A 91 HONDA CBR600 I JUST BOUGHT USED.AND THE BATTERY KEEPS GOING DEAD,NOTHING IS BEING LEFT ON CABLES ARENT LOOSE. I BOUGHT A NEW BATTERY AND IT DONE THE SAME THING. SO I RETURNED THAT ONE AND GOT THE MOST EXPENSIVE BATTERY THEY GOT FOR THAT BIKE. AND IT DOES THE SAME THING.. CAN ANY ONE HELP ME?????  

CAN ANYONE HELP ME????
I HAVE A 91 HONDA CBR600 I JUST BOUGHT USED.AND THE BATTERY KEEPS GOING DEAD,NOTHING IS BEING LEFT ON CABLES ARENT LOOSE. I BOUGHT A NEW BATTERY AND IT DONE THE SAME THING. SO I RETURNED THAT ONE AND GOT THE MOST EXPENSIVE BATTERY THEY GOT FOR THAT BIKE. AND IT DOES THE SAME THING.. CAN ANY ONE HELP ME?????  

CAN ANYONE HELP ME????
I HAVE A 91 HONDA CBR600 I JUST BOUGHT USED.AND THE BATTERY KEEPS GOING DEAD,NOTHING IS BEING LEFT ON CABLES ARENT LOOSE. I BOUGHT A NEW BATTERY AND IT DONE THE SAME THING. SO I RETURNED THAT ONE AND GOT THE MOST EXPENSIVE BATTERY THEY GOT FOR THAT BIKE. AND IT DOES THE SAME THING.. CAN ANY ONE HELP ME?????  

nickb2:
Why do you say the alternator....that makes no sense...please dont post *** the alternator was going out the it would have a battery light on or would not run after a jump start

Nick
ASE Master Auto Technician, L1

I HAVE A 91 HONDA CBR600 I JUST BOUGHT USED.AND THE BATTERY KEEPS GOING DEAD,NOTHING IS BEING LEFT ON CABLES ARENT LOOSE. I BOUGHT A NEW BATTERY AND IT DONE THE SAME THING. SO I RETURNED THAT ONE AND GOT THE MOST EXPENSIVE BATTERY THEY GOT FOR THAT BIKE. AND IT DOES THE SAME THING.. CAN ANY ONE HELP ME?????