PREVOST X3-45 Multiplex, Maintenance Manual

Page: 142 / 1422

Section 06: ELECTRICAL
PA1562
6
NOTE
Spare wires are identified by a wire
identification number and by the letters “SP”, to
designate “spare”.
1.4 CLEANING CONNECTORS
When the pins and sockets of connectors
become dirty, clean them with a good quality
solvent containing HFC 134A refrigerant as its
active ingredient. HFC 134A has two qualities
that recommend it. First, it does not conduct
electricity and therefore, will not cause shorting
between connector pins and sockets. Second, it
evaporates quickly, eliminating the possibility of
condensation within the connectors.
Always shake out or gently blow out any excess
HFC 134A before assembling a connector to its
mating connector or hardware. HFC 134A
trapped in the connector can affect the
connector seal.
DANGER
HFC 134A is toxic. HFC 134A bases
compounds should always be used in a well-
ventilated area, never in a confined space.
Use outdoor whenever possible.
1.5 CIRCUIT BREAKERS
Most electric circuits are protected by circuit
breakers of the “Manual Reset” type. The main
circuit breakers, as well as those protecting the
A/C system, are located on the rear electrical
junction panel in the rear electrical
compartment, on L.H. side of the vehicle.
This type of circuit breaker deenergizes the
circuit without disconnecting any wire. Simply
press down the red tab on breaker to open the
circuit, repair defective circuit, and afterwards
depress black button in center of breaker to
close the circuit.
Smaller circuit breakers may be located in the
VECF of the front service compartment.
CIRCUIT BREAKERS
CB1 Front distribution 24 VI 90 amps
CB2 Distribution 12 VD 90 amps
CB3 HVAC - evaporator 24 VI 90 amps
CB4 Sound system 12 VD 30 amps
CB5 Rear distribution 24 VI 150 amps
CB6 Distribution 24 VD 70 amps
CB7 HVAC - condenser 24 VI 70 amps
CB8 Rear distribution 12 VI 40 amps
CB9 WCL or other option 24VD 50 amps
CB10 Front distribution 12 VI 70 amps
CB11 Sound system 24 VD 50 amps
CB13 Galley or other option 24 VI 90 amps
VD= volts direct. The electrical components
connected to these circuit breakers are direct-
connected to the battery.
VI= volts indirect. Electrical power is supplied
via master relay R1 which engages when
ignition key is in the ON or ACC position and
battery master switch (master cut-out) is set to
ON.
FIGURE 2: REAR ELECTRICAL JUNCTION PANEL
06621