My STI has a parasitic power drain which flattens the battery after about 48 hours.
The first thing was to check the alternator diode, a simple test between the case of the alternator and the output terminal which should only pass power one way. That's OK so it's not the issue.
On the fuse board there are three fuses that carry a constant power with the ignition switch either on or off.
I suspect one of these. A friend suggested eliminating by removing one at a time to see if the battery drains. good theory except it would kill the battery if it happened a few times before diagnosis.
So I'm almost ready to take it to the auto sparkies cause they always seem to isolate stuff really quickly.
But just on the offchance I thought I'd mention it here in case someone has a blinding illumination for me.
Cheers.
The first thing was to check the alternator diode, a simple test between the case of the alternator and the output terminal which should only pass power one way. That's OK so it's not the issue.
On the fuse board there are three fuses that carry a constant power with the ignition switch either on or off.
I suspect one of these. A friend suggested eliminating by removing one at a time to see if the battery drains. good theory except it would kill the battery if it happened a few times before diagnosis.
So I'm almost ready to take it to the auto sparkies cause they always seem to isolate stuff really quickly.
But just on the offchance I thought I'd mention it here in case someone has a blinding illumination for me.
Cheers.