my cosworth battery keeps discharging, the battery is new and after being left for 5 days its dead, charged it up a few times nad it keeps happening? is there any common faults for this to happen?
many thanks

 

Really could be anything mate.

Easiest way to check how much current is being drained is to disconnect a battery terminal and connect in an ammeter between the battery and terminal.

Lock the car up as you would normally (if you have an underbonnet switch for the alarm, this will need to be held down or the alarm may not set right and give an iffy reading), look at the reading on the ammeter, it should read under 0.1 ideally. If it's any higher, then start pulling fuses one by one (putting them back after!!) and see if the current drops. If it does, that's your faulty circuit.

If pulling fuses makes no difference, try disconnecting the alternator, starter motor etc...

Where abouts in Hertfordshire are you? I'm in Watford, so if you're not a million miles away I don't mind having a look at it for you if you want?

 

im in borehamwood matey would be apreciated if you could come and see it, mot is tuesday so fingers crossed

 

Have you checked things like boot light is going off when boot is shut etc?

 

probably a dodgy earth or couple of shorted wires on a low current circuit!


is your sig big enough??

 

alternator could be fooked, i had a saph that would drain the battery after a few days, was the alternator.... had ammeter between battery and terminal was drawing around 2 amps if i remember, until i undid the alternator, bingo..

could be that..

 

Might be a boot lock issue beings yours is missing in the photo, might be putting the boot light constantly on.