TM 10-3930-669-20 10.  REAR WIPER DOES NOT OPERATE (CONT). KNOWN INFO TEST OPTIONS 24 vdc circuits operate. Lead wire 37 OK. Continuity test. STE/ICE-R #91. POSSIBLE PROBLEMS REASON FOR QUESTION Rear wiper switch faulty. Rear wiper motor faulty. If   continuity   is   not   present, rear wiper switch is faulty.  If rear wiper switch is OK, rear wiper motor is faulty. TEST OPTIONS Verify repair. REASON FOR QUESTION If    rear    wiper    operates,    fault    has been corrected. KNOWN INFO 24 vdc circuits operate. Lead wire 37 OK. Rear wiper switch OK Rear wiper motor OK. POSSIBLE PROBLEMS 2-182