SECTION 06: ELECTRICAL
DOB 2490-2789 | X3-45 Commuter PA1605 Maintenance Manual (Final Version) – Sec 06 revised June 2017
7
24d
The power cables are color coded as follows:
24V, larger than 12 GA:
red ribbon winding
around black cable with 9/16
″
between spires.
24V, 12 &14 GA:
pieces of red tape around
black cable, no windings, 9/16
″
spaced.
12V, larger than 12 GA:
yellow ribbon winding
around black cable with 9/16
″
between spires.
12V, 12 &14 GA:
pieces of yellow tape around
black cable, no windings, 9/16
″
spaced.
1.1.5 Spare
Wires
When the vehicle leaves the factory, and even in
the case of a fully-equipped vehicle, an
important number of unconnected spare wires
are routed between the junction boxes.
Consequently, for any connection of an
additional accessory, look in wiring diagram for
“spare” wires in the circuit number listing of
pages e.1 thru e.8 to determine the circuit
number. Refer to page 8.1 in wiring diagram to
find location of these wires.
CAUTION
Wire size is calibrated according to the breaker
or fuse that protects it. When using a spare
wire to replace a damaged wire, assure that
the spare wire size is equal or larger than the
wire being replaced. Using a wire too small for
the breaker or fuse amperage might cause
overheating of the wire.
NOTE
Spare wires are identified by a wire
identification number and by the letters “sp”, to
designate “spare”.
1.1.6 Cleaning
Connectors
To clean electrical connections on the vehicle, a
good quality aerosol contact cleaner is
recommended. The use of a nonflammable
product with fast evaporating qualities (that dries
without leaving residue) will eliminate the
possibility of having cleaning agent tapered in
the connector, possibly affecting the connector
seal.
To specifically clean oxidized cables, a product
that offers the same qualities mentioned above
but with a moderate evaporation time may be
substituted to provide deeper cleaning action
into the cable.
DANGER
Contact cleaners can contain toxic base
compounds and should always be used in a
well-ventilated area, never in a confined
space. Use outdoor whenever possible.
Use of low hazardous (ROHS compliant) and
ozone safe products is recommended.
1.1.7 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 and are accessible from the
engine compartment curb-side door, on R.H.
side of the vehicle.
This type of circuit breaker de-energizes the
circuit without disconnecting any wire.
Circuit breakers CB2 & CB6 are different and
can be used to open the circuit manually, to do
so 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
24VI 90 Amps
CB2
Distribution
12 VD 90 Amps
CB3
HVAC -
Evaporator
24VI 90
Amps
CB5
Rear Distribution
24VI
150 Amps
CB6
Distribution
24 VD 70 Amps
CB7
HVAC -
Condenser
24VI 70
Amps
CB8
Rear Distribution
12VI
40 Amps
CB9
WCL & Battery
Charger
24VD 50
Amps
CB10 Front Distribution
12VI
70 Amps
CB13 Inverter
24VI 90
Amps
VD = Volts Direct. The electrical components
connected to these circuit breakers are direct-
connected to the battery.
