The battery on my 4x4 Sapphire Cosworth is only holding charge for about a week. I have had the battery drop tested (no jokes) out of the car and then in the car to see if it is being charged by the alternator. The results were that the battery is showing 13.94v when the car is off, 12.43v when running with all the screens, blowers, radio on at idle and 13.39v when at 3000rpm. If you lock the car with everything off the battery has 0.6 amps being drained from it and im told the usual is about 0.1-0.3 amps for memories etc.

I have checked that the interior lights are out and they are, any other suggestions??

Please help

 

Try removing the fag lighter fuse. solved the problme on my m8s 4x4.

 

Could it be something to do with your alarm? If you leave it armed all week without using it wont help. Try isolating your alarm from the cars electrical system (With the isolating key if you have one? if not remove the feed) and see how you get on? Not saying that this will solve it but it may elimanate something if not??

Daz

 

Alarm is disabled but problem is still there. Ill try that essex boy cheers

 

this happened on a friends 4x4 saph, it was on the hazzard circuit & his fix was to remove the fuse, not sure if its the same fuse as the cig lighter,

 

I take it the boot light isnt staying on when the bootlid is closed, this happened on my car

 

The other historic one is Fully-Automatic ariel electronic leakages.

 

Cheers for the reply guys, i have done the following......

1) Removed cig lighter fuse (blown anyway!)
2) Checked bootlid light and it goes out when boot is closed

Battery is struggling today although it has started the car, it was charged on Thursday so it looks like its going to be about a week again!!!

HELP

 

The proper way to do it is to run an Ammeter from your battery and remove a fuse at a time until the ampage drops. Then investigate this circuit.

 

Thats exactly what im doing to do on my next day off. I just wondered if anyone had, had this experience before.

 

yeah I did it with my m8s 4x4 saph. he's kept going flat on a weekly basis and we tracked it down to the fag lighter circuit using that same method.

He removed the fuse and its been fine ever since! - I dunno if he ever looked into what was draining it though.

 

Well when i removed my cig lighter fuse it had already blown so i imagine i could count that out anyway. Is there any other circuits that are probable causes?

 

Do you have any stereo amplifiers in the car?

I used to have an amplifier which even though was turned off was still drawing so much power it would kill the battery in a week.