Odd battery issue
#1
Lexus Test Driver
Thread Starter
Odd battery issue
My GS4 doesn't start if I don't drive it for a week and then starts right up with a portable booster, it will then start no problem unless I don't drive it again for say a week. The very odd thing is that my radio stations and the clock remain in memory fine. I've experienced dead batteries before and would have to reset my radio and clock.
Autozone says battery is fine. What gives?
Autozone says battery is fine. What gives?
#4
Lexus Test Driver
Thread Starter
I definitely checked glove and trunk and dome lights several times.
#7
Lexus Test Driver
Thread Starter
No aftermarket alarm
My terminals were old and they were replaced
So if terminals were loose or corroded, why would a portable jumper make it start right up?
My terminals were old and they were replaced
So if terminals were loose or corroded, why would a portable jumper make it start right up?
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#8
Lexus Test Driver
Thread Starter
Jumped it two days ago. Got it warmed up and drove for an hour. Two days later, this morning, got the dreaded Click, Click, Click.
Terminals look tight.
Interior lights and door locks still work.
Terminals look tight.
Interior lights and door locks still work.
#10
iModerate
Clamping jumper cables/pack to loose or coroded terminals can cause them to shift and make enough contact to start the vehicle and appear to be working properly. Then after time they shift again and lose contact.
#12
Battery voltage / health. Don't discount a bad battery even though it was a fairly recent purchase. Many are simply reconditioned / refurbished and an old label gets peeled off and a new one slapped on. Alternator might be the culprit too. Hopefully you don't have a short on the brake lights or somewhere else. That's where I've always found a vampire drain on past cars.
#13
Lexus Test Driver
iTrader: (4)
If you have a digital multi meter you can check the draw yourself.
DO NOT do it with anything in the car on including the key or lights.
Disconnect the neg. terminal and insert the meter in series.
You will see the amp draw (typically only a few hundred milliamps, if more than say 2-300, or say 500 MAX mA then you have a drain and you can start pulling fuses till you find the offending circuit.
Even 500 mA will drain the battery eventually.
DO NOT do it with anything in the car on including the key or lights.
Disconnect the neg. terminal and insert the meter in series.
You will see the amp draw (typically only a few hundred milliamps, if more than say 2-300, or say 500 MAX mA then you have a drain and you can start pulling fuses till you find the offending circuit.
Even 500 mA will drain the battery eventually.
#14
Lexus Test Driver
Thread Starter
If you have a digital multi meter you can check the draw yourself.
DO NOT do it with anything in the car on including the key or lights.
Disconnect the neg. terminal and insert the meter in series.
You will see the amp draw (typically only a few hundred milliamps, if more than say 2-300, or say 500 MAX mA then you have a drain and you can start pulling fuses till you find the offending circuit.
Even 500 mA will drain the battery eventually.
DO NOT do it with anything in the car on including the key or lights.
Disconnect the neg. terminal and insert the meter in series.
You will see the amp draw (typically only a few hundred milliamps, if more than say 2-300, or say 500 MAX mA then you have a drain and you can start pulling fuses till you find the offending circuit.
Even 500 mA will drain the battery eventually.
Secondly, how do I test alternator? (Assumedly with car running)
Thanks