Alternator problem

[nesty]

On a break away my alternator dashboard light came on. I have 2 digital voltmeters on the dash and they both read +15v. I thought something wrong there. Anyway I got it home ok.

I’ve charged the battery at home on my Tronic 3 stage charger though can only get 12.45V from the battery after fully charged.

I replaced the Alternator Regulator. An Alternator place in Nottingham, which some members have used before supplied me a new regualtor. I fitted it, but still having issues which are:

The red light still comes on the dashboard, dim at idle and glows more as engine revved. However the alternator range on the digital readings is lower then before I changed the regulator when had the problem.

I get charging range between 13.9v to 14.8v, but it’s not going to +15v as it was beforehand.

Is there other things in the alternator which can cause the red light to come on? Or is it that the battery not accepting a charge would that make the red light come on?

I might have to be looking at a new alternator?

[kevtherev]

Yes the diode plate in the alternator is on it's way out mate.
This very thing happened to me and lasted six weeks before the whole thing packed up.
I got up to 18 Volts before it went pop.

new alt and every things tickety boo

[nesty]

cheers many thanks. I'll get it replaced.