Circuit Breaker - prime mover smx45 Master Service Manual

F-code Section
PT S5.5
Fuses/Circuit Breakers
Version no T-code
001 SMX
232
Return
C-code
5390

2.3. Circuit Breaker

Under extreme operating conditions, the current demand on
the battery may exceed the rating for the main circuit breaker
(CB1) and force it open. This causes the truck to become
inoperable until the circuit breaker automatically resets itself.
To test a circuit breaker, remove the circuit breaker from the
truck or isolate it from the electrical circuit by removing all the
connections from one side. Let it cool (or reset itself.) Use an
ohmmeter set to Rx1 scale and measure the resistance
across the circuit breaker. The resistance must be less than 1
ohm.
Master Service Manual
Circuit Breaker CB1
2006-08-08