Starter Cranking Circuit Tests
Do not disconnect any terminals. With engine cranking, connect voltmeter at following locations: positive lead to battery positive post, negative lead to battery terminal on starter; positive lead to starter housing, negative lead to negative post on battery; positive lead to engine block, negative lead to battery ground cable. Each of these three connections should show a voltmeter reading of 0.2 volt or less. If any show more, clean or repair cables and connections in circuit.