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How Can I Check My Charging Output.


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#1 frund

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Posted 22 March 2011 - 08:47 AM

Hi, I have a 04 petrol fiesta 12k only. This winter the battery was changed and the correct one fitted but it has slowly discharged, over a couple of months. The previous owner had this problem and her garage came to her rescue occasionally. The original battery was on it when she sold it to me so I felt sure it was a old battery problem. This car is never used at night and usually does 2 miles two or three times a week. This car has mostly done short runs all its life. I kept the old battery which is now on charge. Contacts spotless. Should I check the charge imput or am I expecting too much from my short runs/charge time...any thoughts welcome.

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#2 jeebowhite

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Posted 22 March 2011 - 09:25 AM

Hi, I have a 04 petrol fiesta 12k only. This winter the battery was changed and the correct one fitted but it has slowly discharged, over a couple of months. The previous owner had this problem and her garage came to her rescue occasionally. The original battery was on it when she sold it to me so I felt sure it was a old battery problem. This car is never used at night and usually does 2 miles two or three times a week. This car has mostly done short runs all its life. I kept the old battery which is now on charge. Contacts spotless. Should I check the charge imput or am I expecting too much from my short runs/charge time...any thoughts welcome.


hmmm very perculiar. The mileage of the car shouldnt be giving this sort of problem, but a slow discharge could be a number of things. For Example, I have "Modified" my interior so that I have a 4 - 1 extension running from the 12v socket on my focus, I put the extension underneath the centre console, with the gearstick. My car was "slowly discharging" because I was a muppet and left the extension plugged in, with my Radio transmitter being powered, and the MP3 player charging...

If you take a multimeter to the alternator, that will tell you what sort of power output your getting and if you have got a problem with the alternator.

its a shame the Ford warranty doesnt extend beyond the four years for such a car with so few miles on the clock!!!

#3 frund

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Posted 22 March 2011 - 10:50 AM

Yes very low mileage and has had light use old lady previously but even then I used to start it up and leave it run for 20 mins or so otherwise it went flat over a month or so. I went out this morning and it was totally flat although yesterday it did around 2 miles with nothing on it has slowly been getting weaker. I have fitted the 'old charged overnight battery' and it just flew around. I did notice when I connected the battery that there was a bit of splatter from the terminal so there is something already on although nothing I know of and nothing has been added electrically. Maybe there is a slight discharge somewhere. I am not sure of what is supposed to be on Management system or something. I notice when I change the battery, twice, the radio stays coded although off so something must be looking after this. thanks

#4 jeebowhite

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Posted 22 March 2011 - 11:51 AM

Yes very low mileage and has had light use old lady previously but even then I used to start it up and leave it run for 20 mins or so otherwise it went flat over a month or so. I went out this morning and it was totally flat although yesterday it did around 2 miles with nothing on it has slowly been getting weaker. I have fitted the 'old charged overnight battery' and it just flew around. I did notice when I connected the battery that there was a bit of splatter from the terminal so there is something already on although nothing I know of and nothing has been added electrically. Maybe there is a slight discharge somewhere. I am not sure of what is supposed to be on Management system or something. I notice when I change the battery, twice, the radio stays coded although off so something must be looking after this. thanks


The radio code holds its memory for a short period after the power is lost, once it exceeds this, it then asks for the code. I would suggest its best to take it to Ford, who knows they may do a good will gesture because of the low mileage? unlikely but optimistic!

#5 frund

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Posted 22 March 2011 - 05:09 PM

I will see how it behaves through the next few weeks and if I still, and I suspect I will, have probs then the Ford dealer may be my only choice. I have 2 batteries so no real problem and it takes quite a while to flatten them but it would be nice to know what is causing the batteries to go flat. thanks for your imput.


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