Ford Sierra Sapphire 2.0 DOHC manual 1989

Trying to get engine to crank

Fitted brand new battery 72Ah tested and fully charged

On trying to crank engine nothing!

Off load volts on battery 12.8V

Turn key drop to 10.8V and then recovers

There is a noise from alternator when turning ignition key and if I place my hand on the alternator a vibration can be felt

any suggestions please!


Thanks