Originally Posted by SafeChav
Originally Posted by Wardy257
It depends if the Fiesta as of a similar age. At some point Ford changed it all so the ECU managed the charging rate so it is not always simple.
Really?
So the ECU handles 70 odd Amps of charging current to the battery
No, the ECU will stop the alternator charging in certain conditions.
This sort of thing is going to get worse as the EU want to reduce engine idle speeds lower and lower because of emissions.