TM 55-2210-223-12
TO 45A2-2-14-41
2-3. OPERATOR CONTROLS AND INDICATORS (cont)
Key
Control or Indicator
Function/Use
(3)
Circuit Breaker (1)
Not used.
(4)
Circuit Breaker (2)
Controls most of the low voltage circuits. Must
be ON to operate the locomotive.
(5)
Circuit Breaker (3)
Ground circuit breaker for the engine
temperature and low oil pressure switches.
(6)
Circuit Breaker (4)
Controls the following circuits:
step, number,
and engine room lights and receptacle.
(7)
Circuit Breaker (5)
Ground circuit breaker for the following: step,
number, and engine room lights and receptacle.
(8)
Circuit Breaker (6)
Not used.
(9)
Circuit Breaker (7)
Main circuit breaker for the headlight circuits.
(10)
Circuit Breaker (8)
Controls the electrical equipment cabinet
receptacle.
(11)
Fuse Tester
Used to test the fuses in the electrical
equipment cabinet. When a fuse is placed across
the tester, continuity is indicated by the
lighting of the GROUND indicating light and
the sounding of the warning bell.
(12)
Traction Motor Cutout Switch
Used to take the traction motors on one truck out
(MCO)
of service in the event of a motor failure.
2-10
