Make sure MASTER switch is OFF before repairing electrical com-
ponents. Failure to observe this warning could result in injury to
Step 7. Disconnect connector (1) (lead 415) from air purifier (2) motor. Place red
probe in connector. Ground black probe. Set MASTER switch ON. Set AIR
PURIFIER SWITCH ON. If multimeter indicates about 24 volts, go to step 8.
If multimeter indicates no voltage, repair lead 415 between air purifier
motor and AIR PURIFIER SWITCH, refer to page 2-66. Set MASTER switch
Step 8. Place red probe on air purifier connector (1). Ground black probe. If
multimeter indicates continuity, replace air purifier, refer to page 2-309.
multimeter indicates infinity, repair GND lead, refer to page 2-302.