battery or something else?
07-07-2019, 03:28 PM
#1
battery or something else?
in the mondeo (mk3 2.0 petrol auto)
the battery in the car is showing 12.3v with everything off
not enough to start
give it a jump and it starts on the button, then it's showing 14.19v and with a little bit of throttle it's showing 14.26v
the fiesta i jumped it with is showing 14.46v when running
is this a small enough issue to make you think it's not the battery?
the replacement unused battery is showing 12.56v sitting on the shelf
the battery in the car is showing 12.3v with everything off
not enough to start
give it a jump and it starts on the button, then it's showing 14.19v and with a little bit of throttle it's showing 14.26v
the fiesta i jumped it with is showing 14.46v when running
is this a small enough issue to make you think it's not the battery?
the replacement unused battery is showing 12.56v sitting on the shelf
09-07-2019, 12:56 PM
#3
The voltage you have is fine (running).
It's exactly as Steve has said, you can not test a battery using a multi meter as all it will tell you is the voltage present at that point (no load).
You need to perform a drop test to test it, but yes the fact it starts from another power source would indicate the battery is faulty.
Martin
It's exactly as Steve has said, you can not test a battery using a multi meter as all it will tell you is the voltage present at that point (no load).
You need to perform a drop test to test it, but yes the fact it starts from another power source would indicate the battery is faulty.
Martin
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