Red battery light on
Posted: Tue Nov 06, 2018 7:59 am
This is not for my X5 but for our Range Rover sport supercharged.
The car does not get used regularly for long runs--just school run etc so the other day I put a battery charger on it for about four hours just to give it a boost.
The wife used the car twice yesterday for two runs of 600 metres each (i know don't get me started on that).. After the second run she said the battery light came on.
The voltage across battery this morning was 12.1v before start. First two minutes it was 13.45v then after that there was a whining noise and the voltage was 12.05 and dropping.
What do you reckon - battery or alternator? Funny coincidence that alternator would fail but maybe charging the battery killed it. I have no idea how old the battery is.
Thoughts..
The car does not get used regularly for long runs--just school run etc so the other day I put a battery charger on it for about four hours just to give it a boost.
The wife used the car twice yesterday for two runs of 600 metres each (i know don't get me started on that).. After the second run she said the battery light came on.
The voltage across battery this morning was 12.1v before start. First two minutes it was 13.45v then after that there was a whining noise and the voltage was 12.05 and dropping.
What do you reckon - battery or alternator? Funny coincidence that alternator would fail but maybe charging the battery killed it. I have no idea how old the battery is.
Thoughts..