Hi I am new to this site I have a 2005 Ford Focus 1.6 Zetec and I am currently having a problem where in the morning the battery light comes on when i rev it first thing and stays on for about 20mins during this time the lights dim down and go bright again. I have just put a new Silver Calcium battery on from Ford as the one before was a normal battery. The wires in the connector going into the alternator was showing bare metal and had them repaired. The alternator on it is a reconditioned 105 amp which i had put on about 10 months ago not sure if its a genuine ford one. Any info would be greatly appreciated.