Hi folks hopefully somebody out there can help me out
I have a 2.0 tdci ford mondeo in for a repair the alternator light stays on all the time i had suspected that the diode pack had failed as the battery was charging ok 14.2 volts at idle and drops to 13.5 volt every thing on so sent it out to be checked at my auto sparks he ran it up did some tests said all was ok i have checked wiring and all seems ok have even put a new alternator on to test still the same
The only thing i have noticed is that the heated front screen is not working on theis car wondering if there maybe a fault in this which may be cauzing this fault

any help will be gratefully recieved