4-29. SWITCHES, CIRCUIT BREAKERS, INDICATING LIGHTS, AND FUSES
This task covers:
Tool kit SC4940-97-CL-E16
· Remove rings, bracelets, wristwatches, and neck
chains before working around the locomotive.
Jewelry can catch on equipment and cause injury,
or may short across an electrical circuit and cause
severe burns or electrical shock.
·High voltage is used in the operation of equipment.
Do not be misled by the term LOW VOLTAGE.
Potentials as low as 50 volts may cause death.
Open electrical equipment cabinet and set battery switch to OPEN.
Tag and disconnect electrical leads from defective or circuit breaker switch. Use multimeter and test defective
switches in all positions for continuity.
Use a multimeter and check defective circuit breaker for continuity. Test circuit breaker in both ON and OFF
Use a fuse puller and remove fuse (16) from holder (17). Place ends of fuse in fuse tester (22). Place battery
switch to CLOSE position. If fuse is serviceable, bell will ring and GROUND indicating light will light.