Batterie qui se draîne

M

mk3_lover

New member
Bonjour, je viens de m'acheter un jetta tdi 2003. J'ai changer la batterie parce que mon ancienne se draînais toujours. Après 12h00 d'inutilisation, j'étais pu capable de partir l'auto, la batterie avait pas assez de force pour faire virer le starter. J'ai changé la batterie et j'ai le meme problème. Ca pourrait être quoi mon problème ? La starter tire trop d'ampèrage au démarage ? Sinon j'ai aucune idée..

Merci d'avance
 
Asseille ca.
Quand tu arrive chez toi, débranche ta batterie. Le lendemain tu la rebranche et tu asseille de démarer. Si y par, c'est que tu as quelque chose dans ta voiture qui taite sans arret.
 
Caliss de bonne idee ca. Parce que ma batterie est neuve et quand je debranche le pole positif l'auto cale pas donc l'alternateur charge
 
jespsere tu comprend l'anglais parceque c plus facile pour moi a expliquer en anglais.

i really dont thinks its your starter that pulls to much amperage.. as it would not of started with the new battery anyways..

im sure you have some sort of parasitic draw from the battery draining it over the days..

what you need to do is disconnect the + battery terminal and use a multimeter in series with the poll of the battery and the +battery cable. multi meter set on
amps.

like this
battery-drain1.jpg


makes sure everything is off ALL the lights on off doors closed and if the car has a warning light for the hood latch..even close the latch so no module stays awake.. now you should see something like .01-.07 amps being drawn this is normal..this like the cluster and computers draw a very tiny amount to keep there memory.

is you see anything more then .1 amps really there is something wrong and somewhere there is something drawing juice and killing your battery..

its also good to wait maybe up to 20 min before coming to a conclusion that its drwaing to much because some modules can stay awake for serveral minutes.. so connect the multimeter and let say its pulling .2 amps..wait 20 min and if its still pulling over .1 amps then you know something is wrong..

so next step is to find out what. a simple way to do this is while multi meter still hooked up..just simply pull one fuse at a time from the fuse box..so pull a fuse and check..still pulling to puch juice..put fuse back and pull the next one..go through all of them.. so then lets say you pulling .6 amps..you pull the fuse for the radio and the multi meter now shows .03 amps.. you know its something to do with the radio..could be the radio itself of can be wirring..maybe a bad ground..

but atleast you determine what is pulling amperage.. then after its to investigate ..is it the unit itself maybe wirring or something else..

anyways this should get you started
 
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