3-50.  Siren and Flasher Light a. Removal.  Refer to figure 3-17 and remove the siren and flasher light from the fire truck fender. b. Disassembly.          Refer     to     figure     3-18     and disassemble the siren and flasher light. c. Cleaning, Inspection, and Repair. (1) Clean     all     parts     with     a     clean     cloth' dampened  in  an  approved  cleaning  solvent,  and  dry thoroughly. (2) Inspect all parts for damaged or defective condition. (3) Replace  or  repair  damaged  or  defective parts as necessary. d. Reassembly.        Refer    to    figure    -18    and    re- assemble the siren and flasher light in the reverse order. e. Installation.  Refer to figure 3-17 and install the siren and flasher light On the fire: truck fender. 3-51.  Spotlight a. Removal.  Refer to figure 3-19, and remove the spotlight from the fire truck cab. b. Cleaning, Inspection, and Repair. (1) Clean     all     parts     with     a     clean     cloth dampened  in  an  approved  Cleaning  solvent,  and  dry thoroughly (2) Inspect   all   parts   for   damaged   or   de-: fective condition. (3) Replace  or  repair  damaged  or  defective parts as necessary. c. Installation.  Refer to figure 3-19, and install the spotlight on the fire truck cab. 3-52.  Warning Light a. Removal.  Refer to figure 3-20, and remove the warning light from the fire truck. b. Disassembly.          Refer     to     figure     3-21,     and disassemble the warning light. c. Inspection, and Repair. (1) Inspect all parts for damaged or defective condition. (2) Replace  or  repair  damaged  or  defective parts as necessary. d. Reassembly.          Refer     to     figure     3-21,     and reassemble the warning light in the reverse order. e. Installation,.  Refer to figure 3-20, and install the warning light on the fire truck cab. 3-53.  Underhood Lights a. Removal.  Refer to figure 3-22, and remove the underhood  lights  from  the  fire  truck  radiator  mounting bracket. b. Cleaning, Inspection, and Repair. (1) Clean     all     parts     with     a     clean     cloth dampened  in  an  approved  cleaning  solvent,  and  dry thoroughly. (2) Inspect all parts for damaged or defective condition. (3) Replace  or  repair  damaged  or  defective parts as necessary. c. Installation.  Refer to figure 3-22, and install the underhood   lights   on   the   fire   truck   radiator   mounting bracket. 3-54.  Siren Solenoid Relay Refer to 'figure 3-23, and remove and replace defective siren solenoid relay from the engine compartment. 3-55.  Engine Oil Pressure Sending Unit Refer to figure 3-24, and remove and replace defective engine oil pressure sending unit from the engine. 3-56.  Engine Temperature Sending Unit Refer to figure 3-25, and remove and replace defective engine temperature sending unit from the engine. 3-57.  Circuit Breakers Refer to figure 3-26, and remove and replace defective circuit breakers from the cab fire wall. 3-58.  Siren anal Warning Light Switch Refer  to  figure  -27,  and  remove  and  replace  defective warning light switch from the instrument panel. 3-59.  Siren Hand Switch Refer to figure 3-27, and remove and replace defective siren hand switch from the steering column. 3-60.  Siren Foot Switch Refer to figure 3-28, and remove and replace defective siren foot switch from the cab floor 3-61.  Pump Gaffe Panel Warning light a. Removal.  Refer to figure 3-29, and re 3-28