I own a 2005 (55) Focus 1.6 diesel (89500mls) which has been rock solid (apart from the usual wear and tear bits) since I got it.
Due to work arrangements I spend one week driving long distance (1hr drive start to stop morning and evening) then the next 2 weeks short (10 minute drive from start to stop morning and evening). This has been routine since I owned the car and has never caused a problem before. About 3 months ago I noticed that during my 2 weeks of short trips the battery started to struggle in starting the car to the point where one morning all it gave was enough juice to light up the dash and no more. I thought it was the battery and replaced it, I was then back onto my long week driving and all was well.
Due to holidays, trips etc it's been fine with long journeys quite often.
However, it started to get sluggish again over the past 2 weeks to the point on Saturday where it was completly dead and I was convinced it was the battery so had it swapped for a new one (put it in yesterday) but I decided after fitting the battery to test the current draw and alternator.
Below is what I found. I'm not sure if this amount of idle current draw is too high or normal or what to do next.
Battery idle - 12.49v
Alternator running - 13.89v
All lights, heaters, fans etc on - 13.86v
Above results seem OK to me with regards to the alternator doing what it should.
engine off, everything off and doors closed - 0.37amps
Unfortunatly I do not have a clamp meter but have a multimeter inline on the positive terminal - This therefore reset the system when i put it in place 'waking' up the car.
I hooked up the multimeter and left it an hour - These are my results:
Pulling - No 46 - Central Fuse Box - drops from 0.18amps to 0.13amps
I can not get it to drop any lower than 0.13amps and with what i've read this is exceptionally high for an idle parked up car.
I only removed the mini fuses, I did not touch the big bolted in fuses in the aux box as it was getting dark.
Any advice would be greatly appreciated.