reach extremely high temperatures. Failure to use
appropriate heat protection can lead to serious
injury.
NOTICE
Self-resetting circuit breakers can be perma-
nently damaged if improperly handled. Use the
guidelines below to handle them safely.
•
Disconnect the batteries before removing a
self-resetting circuit breaker.
•
Use a circuit breaker removal tool to remove a
self-resetting circuit breaker. See
Fig. 3.5. Use
of any other tool, including pliers, may damage
the circuit breaker.
•
Never attempt to probe a self-resetting circuit
breaker while installed on the SAM Cab or
SAM Chassis. Remove the circuit breaker first,
or use a non-contact infrared thermometer to
measure temperature.
f001175a
02/27/2012
2
1
4
9
8
6
5
3
7
1. SAM Cab
2. Powertrain PDM (PT-PDM)
3. Powernet Distribution Box (PNDB)
4. SAM Chassis
5. Main Ground Junction Block
6. MEGA Fuse Junction Block
7. Cab Load Disconnect Switch (optional location)
8. Cab Load Disconnect Switch (optional location)
9. Trailer PDM
Fig. 3.1, Component Locations
Electrical System
3.2
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