Topic

I was having issues with a flat battery on a daily basis. As I'm pushing 14.4V from the alternator when running I assumed it was a duff battery, replaced the battery and it was fine for a week as car not moved,.Drove it for the first time since new battery fitted yesterday and later that day flat battery again, what the hell is going on...
There has to be a drain somewhere.
I noticed a while ago the interior LEDs are permanently lit, I think someone here said that's because there's always a small amount of power running in the circuit. where does this power come from, I know they're not using masses but to me that would indicate a short circuit if all switches are open and ignition key removed...

Could be a buggered diode in the alternator, allowing the system to charge the battery whilst running, but also draining the battery when not running.

Oh no...... How do you check for that .....

My interior led's illuminate slightly when the car is powered down.I leave my car in the garage for a couple of weeks sometimes and my battery doesn't drain,so
I wouldn't think that is your problem.

The boot harness can cause a power drain if the wires are starting to break.

Get an amp drain tester..... pop in to a fuse, shut car, let it go to sleep and see if any drain (pop it on dash so you can see)....

The one below is what I got (although mine turned out to be a duff battery in the end!) as it fits both the F/TF early fuses and the later Pektron mini fuses.

Neilsen Fuse Buddy Tester Measure Current Fuse Box Fault Car Diagnose 5A Completed