Help! Battery Discharging

[SpeedySheep94]

Hi all,
I have recently bought a 182 cup and after a couple of weeks it has developed a fault where the battery discharges. I have replaced the battery which made no differance. I have taken out every fuse one by one in an attempt to find the faulty circit, this helped because it used to discharge in 30 mins and now it takes 3 days.
Does anyone have any experience with this type of fault or have an idea of what it could be, is there any common fault it could be?

Thanks,
Sion

 

[DannyR]

Alternator

 

[SpeedySheep94]

Alternator

I think the alternator is ok. When the car runs it produces 14.5 volts and I have disconnected it when the battery is fully charged and the battery still discharges,.

 

[DannyR]

Do you have any additional electrical items? Sub, headunit, sat nav etc....

 

[SpeedySheep94]

Do you have any additional electrical items? Sub, headunit, sat nav etc....

No. I had a sub before I owned it but I took all the wiring out, it want connected at ether end anyway.

 

[DannyR]

I'm fairly sure I've seen it before when an alternator reads correct but isn't charging.

If you've changed the battery then it's 99% not that.

You must have some kind of leakage somewhere of power. But if it's standard with nothing else anywhere then I'm out of ideas, sorry

 

[mattjk]

Get an ammeter plumb it in see what the drain is. If its high keep pulling fuses until it drops

 

[SpeedySheep94]

I'm fairly sure I've seen it before when an alternator reads correct but isn't charging.

If you've changed the battery then it's 99% not that.

You must have some kind of leakage somewhere of power. But if it's standard with nothing else anywhere then I'm out of ideas, sorry

Thanks anyway. If I get time I will take the alternator out and get it checked over.

 

[SpeedySheep94]

Get an ammeter plumb it in see what the drain is. If its high keep pulling fuses until it drops

I have done someting similar with a voltmeter but I will get an ammeter and try it again.

 

[car.crash]

Mine did this.
Turned out to be the alternator. When running it charged perfect but as soon as I shut engine down it sucked the life out of the battery.
Ammeter is needed or some volt meters.
There are great videos on YouTube which show you step by step instructions

 

[SpeedySheep94]

Mine did this.
Turned out to be the alternator. When running it charged perfect but as soon as I shut engine down it sucked the life out of the battery.
Ammeter is needed or some volt meters.

There are great videos on YouTube which show you step by step instructions

Thanks. I will try and pin the fault on the alternator.