TM 10-3930-675-20-1 0006 00-12 TROUBLESHOOTING PROCEDURES (NON-ERROR CODE) - CONTINUED 0006 00 Table 2. Electrical Troubleshooting Procedures (Non-Error Code) - Continued. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 15. Roof Windshield Wiper Motor Not Working - Continued. 3.  Check instrument panel rocker switch for damage and continuity (WP 0199 00-38). Replace  damaged  rocker  switch (WP 0072 00). 4.  Inspect windshield wiper motor   wiring   harnesses   and connectors for damage, continuity, and proper voltage (24V) (WP 0199 00-38). a.  Repair  or  replace  damaged wires    or    connectors    (WP 0111 00). b.  Replace   wiper   motor   (WP 0156 00). 16.  Windshield Washer Not Working. 1.  Ensure that windshield washer circuit breaker number 9 is not tripped. Reset circuit breakers as required (WP 0073 00). 2.  Inspect    windshield    washer motor   wiring   harnesses   and connectors for damage, continuity, and proper voltage (24V) (WP 0199 00-40). a.  Repair  or  replace  damaged wires    or    connectors    (WP 0111 00). b.  Replace  washer  motor  (WP 0157 00). 3.  Check accessory control lever switches and wiring for damage  and  continuity  (WP 0199 00-40). Replace damaged accessory control lever unit (WP 0112 00). CAB INTERIOR LIGHTS AND 12-V UTILITY PLUG 17.  Cab Interior Light(s) Not Working. 1.  Check   position   of   blackout drive/marker light switch. Place blackout drive/marker light switch in OFF position. 2.  Ensure  that  cab  light  circuit breaker    number    2    is    not tripped. Reset circuit breakers as required (WP 0073 00). 3.  Inspect cab lights for damage or burned out lamps. a.  Replace   burned   out   lamps (WP 0088 00). b.  Replace   damaged   cab   light (WP 0088 00). 18.  12-V Utility Plug Not Working. 1.  Ensure that voltage converter unit circuit breaker number 14 is not tripped. Reset circuit breaker as required (WP 0073 00). 2.  Check   12/24V   converter   5 amp fuse. Replace  5  amp  fuse  (WP  0073 00). 3.  Check  voltage  converter  unit for   proper   voltage.   Voltage should be 24V in and 12V out. Replace voltage converter unit if voltage  is  not  as  specified  (WP 0073 00).