TM  55-1520-240-T 12-1.6 12-1.6  COPILOT’S  WINDSHIELD  DOES  NOT  GET  WARM  (Continued) IS COPLT  WSHLD  CONT   CB OPEN? REFER  TO  TROUBLE  SYMPTOM 12-1.4. IS COPLT  WSHLD  HEAT   CB OPEN? CONNECT   SENSOR   WIRES OPEN  NOSE  ACCESS  PNL REMOVE   DYNAMIC   ABSORBER CONNECT  PILOT’S  WIND- SHIELD   ANTI-ICING   CONTROL BOX  IN  PLACE  OF  COPILOTS WINDSHIELD  ANTI-ICING  CON- TROL BOX, SET CPLT WIND- SHIELD ANTI-ICE SW TO ON. DOES   COPILOT’S   WINDSHIELD GET  WARM? YEs REPLACE  COPILOT’S  WIND. SHIELD   ANTI-ICING   CONTROL BOX.  CONNECT  PLUG  083P3  TO PILOT’S CONTROL BOX, LOCATE OPEN IN WIRE W559- 110-22,   W645-62-22,   OR W550-23-22  BETWEEN   CPLT WINDSHIELD  ANTI-ICE  SW AND CB 083CB2. REPAIR OR REPLACE WI REAS REQUIRED. CHECK  FOR  GROUND  ON WINDSHIELD GROUND TER- MINAL. IS GROUND PRESENT? SET CPLT  WINDSHIELD ANTI-ICE SW TO OFF. DISCON- NECT  TWO  WIRES  FROM SENSOR  TERMINALS  ON  CO- YES PILOT’S   WINDSHIELD.   CHECK RESISTANCE  BETWEEN SENSOR  TERMINALS  IS RESISTANCE 180 TO 340 OHMS? CONNECT  PLUG  083P3  TO PILOT  S  CONTROL  BOX  CHECK I SET COPLT  WINDSHIELD ANTI-ICE SW TO ON. CHECK FOR  115  VAC,  BETWEEN  COPl- LOTS   WINDSHIELD   POWER TERMINALS. IS 115 VAC PRESENT? FOR  28  VDC  BETWEEN  PIN  A (+) OF PLUG 083P1 AND YES GROUND IS 2B VDC PRESENT? YES REPLACE  COPILOT’S  WIND- SHIELD LOCATE OPEN IN WIRE W558- 17-20,   W639-141-20,   OR W559-205-22   BETWEEN   PLUG YES 083P1 AND  CPLT   WIND- SHIELD ANTI-ICE SW REPAIR LOCATE OPEN IN WIRE W558- GD042A12N  BETWEEN  WIND- SHIELD  AND  FUSELAGE GROUND  REPAIR  OR  REPLACE WIRE  AS  REQUIRED. LOWER OVHD PNL, CHECK FOR 28 VDC BETWEEN TERM 3 (+) OF CPLT WIND SHIELD  ANTI-. ICE SW AND GROUND IS 28 VDC PRESENT? CONNECT  SENSOR  WIRES  TO SPARE SENSOR TERMS IF AVAILABLE.  IF  NOT  AVAIL- ABLE, REPLACE COPILOT’S WINDSHIELD OR REPLACE WIRE AS RE QUIRED. REPLACE CPLT WINDSHIELD ANTI-ICE  SW, CHECK  FOR  28  VDC  BETWEEN TERM 2 (+) OF  CPLT  WIND- SHIELD ANTI-ICE SW AND GROUND IS 28 VDC PRESENT? YES 1^NO REMOVE  ELEC  PWR  OPEN  NO. 1 PDP. CHECK FOR CON- TINUITY  BETWEEN  TERM  2  OF CPLT  WINDSHIELD  ANTI-ICE SW AND CIRCUIT SIDE OF COPLT WSHLD CONT  CB 083CB2.  IS  CONTINUITY PRESENT? REPLACE  COPLT  WSHLD CONT  CB I NO J GO TO NEXT PAGE 12-9