Troubleshooting Magnetic PickupsDisconnect the pickup leads. Check between leads with an ohmmeter forresistance as listed below. Check between the pickup case and leads with anohmmeter for near infinity resistance. Start the prime mover and control speedmanually or block the throttle. Check pickup leads with a high-impedance acvoltmeter for 10 to 20 V (ac, rms). Reconnect the pickup and check at the speedsensor input terminals for a minimum 1.5 V (ac, rms) at the lowest controllingspeed. Check the pickup and gear clearance if voltage is low.