My most recent issue I am having with my focus, adding to a very very long list, is that now it drains the battery when parked. I have absolutely no clue as to why either. no lights are on in the car and I have no radio at all anymore(removed it). I noticed when I shut the car off the temp and fuel gauge will jump back to where they last were(i.e. warm for temp gauge and whatever fuel level is in the car). Does anyone have any idea what would cause this?
EDIT: So i had the car running for a little while shut it off and 5 mins later it was flat again...
01-31-2013 04:51 PM
a bad battery/alternator notwithstanding, do you have access to a DC ammeter? That and some fuse-pulling might help you narrow it down.
01-31-2013 05:02 PM
how old is battery
01-31-2013 06:27 PM
Get your alternator tested ASAP. It's probably in the way out. Mine just died in my 06 ZX4, they may be approaching end of life.
01-31-2013 06:52 PM
Nope at charging it shows 14.8 volts. I may have to go the route of fuse pulling and checking. Battery is two years old and this problem just started. The car usually sits two to 3 months due to its other issues. ( clogged cat, terrible idle, no winter tires. )
01-31-2013 11:30 PM
So I charged the battery with a charger up to 12v. I unplugged it and stuck on my voltmeter. It drops voltage at .01 a second... disconnected the batter from the car and it still drops voltage but much more slowly. I think the battery is bad amongst something in my car drawing power off of it. I hooked back up and it no longer dropped outrageously fast. Further testing will have to be done later.
01-31-2013 11:35 PM
To test for a draw you need to properly set up your meter to measure amperage, not voltage. Disconnect the negative cable and put one probe on the negative post and the other on the negative cable and this will give you a readout of how many amps the car is pulling. Use alligator clips and then let the car sit there a while to let all the modules go to sleep. Ensure the doors are all closed and the key is out of the car.
However your issue just sounds like a bad battery. The fact that the voltage is visibly falling while the battery is out of the car means its just unable to hold a charge.
01-31-2013 11:41 PM
That's my thought too. It is four years old with a ton of start stops. It just crapped out with zero warning. First time that's happened to me.
Thanks for the tip on draw. I'm not much of an electrical guy. I usually try to avoid things that involve it at all cists
02-01-2013 12:10 AM
Parasitic draw test is the only way to find out how many milliamps are being used like jetrinka said. i think the acceptable amount of draw is 50-ish milliamps. if a relay is active you'll see a serious increase in milliamps. in the hundreds which is highly unacceptable. if you see that it is reading high after letting the car sit for 10 minutes to let the computers rest, then my suggestion is to start pulling relays to fine point the area. youll need an ETM to trace it back.