17. Check the full-load switch (16) : - Switch A: in position «Pressure switch » Check that the connector on the full-load switch is properly fitted. 1) With the engine stopped and ignition on, the voltmeter needle should indicate a value lower than 6 (upper scale-voltmeter ) 2) Start the engine With the engine idling, the needle should indicate a value above 17 (upper scale-voltmeter ) ; otherwise : If the needle indicates 0 :