cossie604

iTrader: (2)

Ford focus, just changed alternator for a new one and the battery light comes back on after 30secs.
Been told that it may have to go to ford to be caliberated. Is this correct ?
Something to do with the smart charge??
Ford wise, this is abit modern for me None of our Vauxhall's (Im a vauxh tech) do it though.

martysmartie

iTrader: (1)

The Focus employs as you say a "Smart Charge" system and the voltage regulation is under control of the ECU so would imagine this is where the problem lies, I'm guessing the old alternator was faulty?

Martin

turboRS

is it a diesel? how old? check the wiring to the connector. these suffer with broken wiring!

cossie604

iTrader: (2)

Well, it was diagnosed else where then I was asked to change the alternator for him (he supplied the unit)...every day is a school day I guess Cheers mate

sebspring

iTrader: (3)

disconnect the battery for half an hour then reconnect reset the ecu. try sticking it in learn mode?