Battery flat after 2 days!

[djses9]

My battery goes flat after 2 days - Its not the internal lights or the boot light/s
and it's not the stereo. What ever it is it's drawing nearly 3 amps! (when checked at the battery with key off). I'm no auto electrician so dont know where else to look!
It has a dynatron alarm, could this be the cause? If so does any one know how to
disconnect it? because I know it immobilises the car.

[wamboin23]

unplug the plug on the regulator of the alternator and see if it goes away.

sounds like the fault may lie with the alternator.

[TheForgotten]

my vote's in the diode

[hako]

Immobilisers can fail and cause your problem. To test whether the alternator has bad diodes you will need to remove the thick cable that is bolted to the rear of the alternator. Be careful when doing and don't let the cable earth out as it is unfused. If it sparks when removed that will indicate the diodes are bad.

[wortus]

If nothing in the car is running like lights etc then it's probably a field diode in the alternator.

[djses9]

will try suggestions and post reply - cheers

[stealthvn]

hay guys i have the same problem on my ss i will let u know how it goes once battery is recharged

[stealthvn]

so to fix this would you suggest just replace the alt?

[hako]

I wouldn't replace the alt just because the battery is flat...first I'd decide if maybe the battery is past it's use-by-date. then if the red charge light has been lit I'd do some checks to see if it is repairable. If the red light is not lit when running I would then use a multimeter to check that the voltage across the battery at about 1000rpm was above 14V....if it wasn't I'd check the brushes/regulator.
But the first thing is to find out why your battery is flat. Good Luck.

[stealthvn]

yea i thought it was the battery first so i replaced that but same prob ill recharge battery then disconnect the wire and see how i go, its only going flat while car is turned off all lights are off and i have disconnected amp ect

[Brett_jjj]

Glove box light.?

[terry_toughnuts]

Get someone to sit with the multimeter outside the car while you pull each fuse. Once the reading goes down you will know what circuit the current is being drawn from. That should give you a decent clue to where the problem lies.