TM 9-2320-364-20-2 2-1284 15.  LEFT REAR TURN SIGNAL DOES NOT OPERATE (CONT). Right rear turn signal operates   indicating 2 to 10 vdc supplied   to turn signal switch. Left taillight operates   indicating composite light   ground wire 1435 OK. Turn signal lamp OK. Composite light faulty. Wire 1003 faulty. Turn signal/flasher switch   faulty. KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Continuity test. STE/ICE-R #91. If the turn signal socket ground is faulty, turn signal will not operate. YES NO Replace rear composite light (Para 7-47). Verify repair, go to Step 6 of this Fault. 3. Is there continuity measured between socket ground contact of turn signal socket and a known good ground? Fault not corrected. Notify DS Maintenance. 2. Go to Step 4 of this Fault. YES NO Right rear turn signal operates   indicating 2 to 10 vdc supplied   to turn signal switch. Left taillight operates   indicating composite light   ground wire 1435 OK. Turn signal lamp OK. Composite light faulty. Wire 1003 faulty. Turn signal/flasher switch   faulty. KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Voltage test. STE/ICE-R #89. If 2 to 10 vdc are not present, the turn signal will not operate. WARNING WARNING Is a pulsating voltage of 2 to 10 vdc measured at socket power contact of turn signal socket? Read   WARNING on Page 2-1285 Read   WARNING on Page 2-1285