TM 9-2320-364-20-2 2-1270 13.  ALL TURN SIGNALS DO NOT OPERATE (CONT). Headlights operate, indicating   10 to 14 vdc are present at   splice in wire 1189 after the   blackout service select   switch. Turn signal switch/hazard   switch OK. Wire 1189 OK. Wire 1080 OK. Flasher M5 faulty. Turn signal/dimmer switch S1   faulty. KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Voltage test. STE/ICE-R #89. If 2 to 10 vdc are not present, flasher is faulty.  If 2 to 10 vdc are present, turn signal/dimmer switch is faulty. YES NO Replace flasher M5 (Para 7-97). Verify repair, go to Step 5 of this Fault. 4. Are 2 to 10 vdc measured on wire 1080 at turn signal/dimmer switch connector MC7, terminal F? Replace turn signal/ dimmer switch (Para 7-35). Verify repair, go to Step 5 of this Fault. WARNING Headlights operate, indicating   10 to 14 vdc are present at   splice in wire 1189 after the   blackout service select   switch. Turn signal switch/hazard   switch OK. Wire 1189 OK. Wire 1080 OK. Flasher M5 OK. Turn signal/dimmer switch S1   OK. KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Verify repair. If turn signals operate, fault has been corrected. YES NO Fault not corrected. Notify DS Maintenance. 5. Do turn signals operate? Fault corrected. WARNING Read   WARNING on Page 2-1271 Read   WARNING on Page 2-1271