[stewby2202]

There is a single white wire coming of the battery housing joined and clipped on the bulk head. Unplug it and run car, this will stop your battery light coming on. I,m unsure myself as to wether this is the signal feed to the battery smart module or if it is just the battery light feed. Either way it means there is an issue but my 2011 4.5 2.0 tdci tx runs fine with it unplugged. Strangely, New battery and alternator. Battery is showing 12.04v static. Alternator on cold start is showing only 11.7 output. Q.what is the white box that is fastened to the ground terminal on the battery. Red wire from the + goes to it and the white wire which I have unplugged goes to it also. I suspect it is to do with the smart charge.

 

[joss002]

After changing alternator. Running a new sensor wire and still having the fault. It turned out to be a bad earth. 8 or so hours wasted. Took 5 mins to clean the earth strap from body to gearbox. Fault cleared and light off. Bloody new technology is such a pain. Just glad its sorted. I was at my wits end.

Where abouts is the earth strap from the body to the gearbox?

 

[T1Cybernetic]

I've got a similar problem, Intermittent battery warning light on the dash I get a consistent 13.8v when the warning light is on and 14.4v (I believe) when the warning light is off so I think there is a bad wire or short somewhere.

The alternator checks out as far as I can tell (Multimeter testing only) and the battery works excellent (Had it in another car) with no problems.

After some searching for a solution I found a similar video on Youtube which lead me to talkford.

I haven't had chance to look for the earth strap myself yet but I suspect it could possibly be the cause of the problem, Or at least I'm hoping so As It's a fairly simple fix!

The question I have is, Before I start, Where are the problem wires that I should be checking for?

 

[vinokirk]

I've got a similar problem, Intermittent battery warning light on the dash I get a consistent 13.8v when the warning light is on and 14.4v (I believe) when the warning light is off so I think there is a bad wire or short somewhere.

The alternator checks out as far as I can tell (Multimeter testing only) and the battery works excellent (Had it in another car) with no problems.

After some searching for a solution I found a similar video on Youtube which lead me to talkford.

I haven't had chance to look for the earth strap myself yet but I suspect it could possibly be the cause of the problem, Or at least I'm hoping so As It's a fairly simple fix!

The question I have is, Before I start, Where are the problem wires that I should be checking for?

Same issue here, two years ago battery light started coming on intermittently. Garage replaced alternator and battery, was ok for about a month, then battery light started to come back on. Ignored it till two weeks ago, battery light on permanently, then card wouldn't start. Charged battery up myself, its OK for a few days, then wont start. So looks like battery is not being charged.

 

[PURPLE_2L_LX]

Battery / Alternator test... http://www.talkford.com/topic/205394-battery-test-procedure/

 

[teett]

I had the same fault code . First I cleaned the earth strap, but it didn't solved problem. Then I bought an alternator data wire repair kit (Elparts 51277370). It has plug and 0,5m of wire. To do the fix, you need to unplug AC clutch and oilpan sensor from underneath the car. So far it looks that this repair works. No more battery fault light for a month now.

 

[ashn615]

Hi mate , is this on a mk5 mondeo? Have you got instructions?

 

[PURPLE_2L_LX]

Hi mate , is this on a mk5 mondeo? Have you got instructions?

No this is the Mondeo MK4 section, select forums up on the top right and scroll down to the MK5 section.