Hi all, hope someone can help.

My V6 Mondeo battery light stayed on this morning, so if i make it home tonight how do i test the battery and or alternator.

I have a multimeter.

Is it as simple as test voltage across the battery with and without the car is running.
When the car is running i assume i should have more volts due to alternator input (if the alternator is working) ????

cheers