TM 10-3930-675-20-1 0047 00-2 TOPHANDLER TWISTLOCKS AND FORKLIFT SENSOR TROUBLESHOOTING - CONTINUED 0047 00 Table 1. Error Code 212 - Tophandler Left Twistlocks Indication Failure Troubleshooting Procedures - Continued. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Error  Code  212  -  Tophandler  Left  Twistlocks Indication Failure - Continued 3. Remove  tophandler  junction box   cover   and   ensure   that circuit breakers F41, F42, and F43  are  not  tripped.  Check wire from circuit breaker F42 to connector X181 for damage. a. Reset    circuit    breakers    as required (WP 0076 00). b. Replace damaged connectors (WP 0111 00). 4. Remove  junction  box  X183 cover (located on left end of tophandler) and check voltage   between   connector X183 pin 3 and pin 4. Voltage should be 20-25V. a.  If     voltage     is present, perform   functional   check of     left     side     twistlock proximity switches by placing    a    metal    object within 5 mm of tip of each switch.   Proximity   switch indicator light should illuminate. If    indicator    lights    do    not illuminate,    replace    proximity switch (WP 0074 00). b. If indicator lights illuminate, check voltage at junction  box  X183  pin  5 (for  unlocked)  and  pin  6 (for locked). If voltage is not present, replace proximity switch (WP 0074 00). 5. Remove cover from junction box X182 (located on top of tophandler).   Check   voltage between  junction  box  X182 pin   4   and   pin   5.   Voltage should be 20-25V. If  voltage  is  not  as  specified, repair   or   replace   cable   from junction box X183 to connector X182 (WP 0111 00). 6. Check    continuity    between junction box X182 pin 8 and junction box X183 pin 5 and between  junction  box  X182 pin 9 and junction box X183 pin 6. If   continuity   is   not   present, repair   or   replace   cable   from junction box X183 to connector X182 (WP 0111 00).