Clutch Switch

Connect voltmeter or test light positive probe to Blue wire terminal of control unit connector. Connect negative probe to ground. Turn ignition on and depress clutch pedal. There should be voltage. If no voltage, check clutch switch.
Adjust or replace as necessary. If there is voltage, release clutch pedal and check for voltage. There should be no voltage. If no voltage, clutch switch is okay. If there is voltage, check clutch adjustment. Adjust as necessary and retest.