Waking up to a flat battery

[Nathane89]

Hi I have a 2014 ford focus 1.6 zetec diesel and have been having the same issue now for just under a year where I wake up in the morning and the battery is flat. I have changed the battery and the alternator and was still having the same issue. The last garage I took it to did a vault drop and said it was a drain caused by my stop start sensor so I have had that replaced and for the last 3 months the car has ran fine. But the past week the issues have come back to a point where I can pull up for work at 9 and by 12 the car wont turn over. Any help would be much appreciated please thanks.(also this morning when I went to take the key out of the ignition to stop the car the engine was still running and had to stall it to cut the car out)

[Phil21185]

Parasitic battery drain. Something is keeping the electrical system awake and drawing power.

I had the same problem a couple of years ago. There's a thread somewhere, but I basically pulled each and every fuse one by one while having terminals across the battery to measure the draw to find the culprit.

I seem to remember not finding an obvious reason but it sorted itself after that and I've not had a problem since.