How do you do test 1, I think mine could be on lits last legs.

Cheers
Simon

 

with your engine idling check the voltage at the battery connectors then switch on your lights and check the voltage.don't know exactly what it should be on a scoob someone will let you know.but as a rogh guess you should get about 13.7 volts or around 13.4volts with the lights on.