my car has been sitting for only 2 days, and i went to start it up to move it and the batter is dead. second time this ahs happened. i really dot kno what would cause this to happe any input? i have kick subs with a 400 watt amp, what should i check? it has a capacitor on it and it lights up. i did notice the other night when i parked it, the capacitor clicked about every 7 seconds, dont kno why, could this be it> like i said im lost as to what to check lol. thanks.

 

How old is your battery? Maybe its dead

 

dont kno how old it is, its never gave me any fit other than one other time about 2 weeks ago when i was going to park it and let it sit for 2 days.

 

Check for amperage when the car is off

 

on the compacitor it was reading 14.1, now the car has been off for about a hour, and the compacitor is reading 12.0.

 

amperage not voltage

battery should be at 12.5 or so if its good. 12.0 means weak

 

my multimeter has a batter tester, 9v or 1.5 v.... dont i need 12? i never really messed with electrical stuff.

 

that battery tester is for small batteries...like batteries that go in remotes and flashlights

 

just tested it with the one setting that worked, it was the 9v setting, the 1.5 gave me a 1, with the 9v setting it read 11.92.

 

ok thats what i thought but i wasnt sure. i opened up the trunk and the compacitor is off and aint drawing any juice....

 

just read voltage. no testing

or go to a parts store and they can tell you your cold crank amps

 

Does the car even try to turn over? If you have 12 volts that should be enough to start the car... If it tries to start but not crank, I would pull the in-line fuse to your audio equipment and try to start it up. I never trust what a capacitor reading says.

 

a car can have 12v but not have the capacity to start

 

Which is why I asked if the car even tries to turn over. I've had a capacitor drain enough to not allow full amperage to go to the starter.

 

or like me and probably have a bad cell. Car starts fine but if you leave a load on it after its been off for 5 mins then its dead

 

That could also be the issue

 

alright well ill lok into it more tommorow, take it to my local napa so my buddy who works there can test it and go from there.