Battery going flat to quick

[Voodoo]

Howdy, just wondering what would cause my battery,(near new) to go flat so quick, if i leave car parked for 3+ days the batterys gone flat as if somethings sucking charge while its parked? my previous battery had the same prob

[Monsterbishi]

One of your ancillary devices will be drawing current, first thing to check would be the alternator, it has a diode to stop current from bleeding off the battery, if that fails...

[matt dunn]

One of your ancillary devices will be drawing current, first thing to check would be the alternator, it has a diode to stop current from bleeding off the battery, if that fails...

A good place to start but toyota alterners hardly ever give diode problems unless they have been flashed backwards. Would probably replace 1 to every 200 mitsi or nissan ones.

Most likely cause will be wrongly wired car alarm ,stereo or amp,
or,
a boot light, glove box light etc staying on.

Matt

[Bahamuth]

yeah, I have the same problem too.
but then when I use the old battery it can last for 1 week.
The new battery if I don't run the car for 2 days, I can notice it sort off not enough power to start the engine.

[skoty]

first thing to check would be the alternator, it has a diode to stop current from bleeding off the battery

The rectifier that is

[Monsterbishi]

That's the word I was looking for!

[sopachrga]

Hmm I have the same problem on my '84 I pput a new battery in it last night started perfectly then I ran it for about 45 minutes. and it won't start this morning, it won't even turn the dash lights on!!!!

[Voodoo]

hmmmm, something strange is going on

acaully even since i had my engine swap my batterys have always been abit dogey, but i usaully had juice enough to start , but then again i use to drive it every day, now its garaged most of the week, i asume u are running a 4agZe Sopachrga what about u Bahamuth?

[Leon]

I have had both my AW11 and my AE92 have exactly the same alternator failure that has seen them run the battery flat.

Although on the AW11 I wasted my money buying a new battery as well, damnit.

So I would repeat the first bit of advice, and have the alternator tested.

[Voodoo]

Cheers, ill get it tested, but yeah , i fell into that trap to, aready on my second battery, bloody first one prob still all good

[Lloyd]

Hmm I have the same problem on my '84 I pput a new battery in it last night started perfectly then I ran it for about 45 minutes. and it won't start this morning, it won't even turn the dash lights on!!!!

Charge the battery or jump it and see what the voltage at the battery is. If its reading under 13-14V then your alternator is poked

[sopachrga]

i asume u are running a 4agZe Sopachrga

Not in the '84, that is an NA auto, My '87 is a 5 Sp 4AGZE.

I think I might take the alternator out and go and get it tested.

[Bahamuth]

mine is stock bluetop 4age.
The battery just seem won't be able to hold the charge for few day
I still couldn't figure out until now. it's not a big deal before because I drive it everyday too. now it stay in the garage it become pain in the ass coz i have to keep starting the car for every other day.