Disco 2 BCU draining battery.

All sorted now, thanks for advice.

Depinned about 5 wires from the plug before finding the draw as permanent live to head unit.

I know @PopPops mentioned this but as the radio is completely stock and has never been removed upon inspection - it took me by surprise. Although it is one of the "GPS" LR head units so maybe that played a part. Unit swapped out, now next to nothing in draw.

Off topic, but I'm just tidying some bits up, ACE has been removed previously.. but they botched it by putting tape over the light and cutting the wire to the beeper..

Put the beeper back, unplugged the ACE ECU and jumped the correct 2 pins, but it didn't turn the ACE light off... As I'm typing I recall I pulled the fuse and relay for the ACE when trying to find idle draw.. maybe thats it.

Well done, for the ACE light to go out the fuse must be in for the led to get positive on the earth path

Jamiegreen said:

All sorted now, thanks for advice.

Depinned about 5 wires from the plug before finding the draw as permanent live to head unit.

I know @PopPops mentioned this but as the radio is completely stock and has never been removed upon inspection - it took me by surprise. Although it is one of the "GPS" LR head units so maybe that played a part. Unit swapped out, now next to nothing in draw.

Click to expand...

Well done, glad you sorted it. The reason I mentioned the head unit is that many have changed their ICE and the LR installation is not completely standard (whatever that means these days!) so there is plenty opportunity for getting things wrong.