Vehicle & Technical > Defender

charging question

(1/2) > >>

suggs:
am i correct in that if im getting about 12.9-13v at the battery with the engine running, and if i disconect the alternator and the volts drop to 12v at the battery then everything is charging correctly?

as ive just had a flat battery and its only a few weeks old, shortly after fitting a new battery the alternator belt snapped and battery whent flat driving home, after i replaced the belt i jump started the 90 and drove about 20 miles, since then ive only done a quick local trip when it started but didnt fell like it had a full punch to it. its since been parked up for a week in the cold weather and today it was flat as a pancake. it jumped started straight up and then i used a multi meter to get the above results, im just trying to find out if its the alternator, battery or if it just wasnt fully charged and the cold has knocked it out.

ive now got it on charge..

cheers

muddysteve:
14.2v is what your looking for

maybe your alternator is on its way out

suggs:
yeah maybe :?

seems to be rising now as the battery is charging, getting 13.7 when ticking over, have to see what it shows once fully chraged

V8MoneyPit:
If it drains down while you aren't using the vehicle, it's either a faulty battery or a dead short somewhere.

Stick it back in once it's fully charged. Check the voltage then leave it for a couple of days. If it's drained down, you know it's not a charging fault.

suggs:
yeah thats what ill do, worth while getting an on board volt meter to keep an eye on these things :idea:

would a 20 mile drive be enough to charge a flat battery?, bit of luck it wasnt and the cold weather just took it down..

Navigation

[0] Message Index

[#] Next page