Alternator charging at 13.1 volts I normally fit Ford units to these but there wasn't any available and they were £340 +vat I fitted a lucas unit from ECP it lasted 6 weeks when I phoned to say it was faulty they said it should never have been supplied to the vehicle I phoned another supplier who said they had one for the vehicle in Delco Remy that was the same 13.1 vols I phoned the tech dept and they told me it was the correct alternator and it must be faulty I fitted another unit and that was just the same having only ever fitted Ford units as anyone else had problems with aftermarket on fords Cheers John

I haven't had any problems but could it be something In the pcm strategy like a temp sensor making it have a slightly lower voltage?
Will it charge with the plug disconnected?

have you checked the connection to the battery sensor on the negative battery terminal?

Hi
I take it that is 13.1 at alternator as well a battery ? i.e. no voltage drops

some of these smart charge systems read low voltage at times depending on conditions /strategy of ECU,what is the actual symptoms with the vehicle ?
Any Fault codes ?

Hi thanks for the response the battery was going flat and the alternator warning light was flashing I have now fitted a Ford unit it is charging at 14.25 and everything seems ok I will await Delco response on the 2 I have sent back

Hi John,had similar problems with delco starter motor fitted four to an Astra 1.7dti slow cranking speed.inside box testing certificate sign as fully functional, makes you wonder.
Mike hometune