TM 55-1930-209-14&P-10 2-13 Troubleshooting.  Troubleshoot normal interior lighting system as given in Table 2-3 and the emergency interior lighting system as given in Table 2-4. Table 2-3.  Normal Interior Lighting System Troubleshooting Condition Possible Cause Suggested Action 1 ROWPU space overhead a. Circuit breaker 2P13 on a. Close circuit breaker fluorescent lights power panel 3 open do not come on when any circuit breaker b. Circuit breaker P13 on b. Close circuit breaker 2P13-1 thru 2P13-4 switchboard open (Figure 2-6) is closed c. Port or starboard door open c. Close door d. Bulb(s) burned out d. Replace bulb(s) e. Door interlocking (black- e. Make sure switch is out) switch locked in operating normally open position f Faulty circuit f Check circuit g Circuit breaker P13 on g Close circuit breaker switchboard open 2. Dayroom overhead a Circuit breaker 2P13-6 on a Close circuit breaker fluorescent lights do not deck lighting panel open come on when either day- room rotary light switch is Circuit breaker 2P13 on b Close circuit breaker turned on power panel 3 open 3. Emergency fluorescent a Circuit breaker 10P13A-1 a Close circuit breaker lights in ROWPU space do on emergency lighting panel not come on open b Bulb(s) burned out b Replace bulb(s) c Starboard door open c Close starboard door d Door interlocking (black- d Make sure switch is out) switch locked in open operating normally position e Dayroom rotary switches e Replace switches malfunctioning f Faulty circuit f Check circuit 4 Workshop overhead a Circuit breaker 2P13-5 on a Close circuit breaker fluorescent lights do not deck lighting panel open come on when rotary work- shop light switch is turned b Circuit breaker 2P13 on b Close circuit breaker on power panel 3 open c Circuit breaker P13 on c Close circuit breaker switchboard open d Bulb(s) burned out d Replace bulb(s) e Workshop rotary switch e Replace switch malfunctioning f Faulty circuit f Check circuit 2-15