charge light mystery

[Pelo]

The battery charge light in my EE90 corolla has been lit intermittently for a week, and last night the battery died completely. I have checked all the fuses and replaced the alternator with a spare but the light is still on. Voltages are:

12.2v - battery to earth, car off
13.9v - battery to earth, engine running at cold idle speed
14.1v - alternator to earth, engine running at cold idle speed

What else should I check?

[Boosted_162]

How old is the battery? Battery could just be stuffed and wont charge perhaps.

[Bling]

Yeah that would be the first thing I would get checked too. 12.2V can still be given off by a stuffed battery.

[AE82 FXGT]

Once batteries (except deep cycle jobbies) have been run flat, they're never really the same again. Proly just your battery, could've been like that for a while but the cold really lowers their cranking amps.

[NZ_AE86]

It is quite likely that your Alt. has a sick Regulator. You should get it checked out.

[Pelo]

Sorted, just ended up being a bad earth

[strx7]

Sorted, just ended up being a bad earth

my fiance's ee90 and ke25's have both had that issue. intermitently wont start. clean up the battery terminals and all sorted