Regulator/Rectifier Inspection - Honda CB250N Shop Manual

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^WARNING
If
the
engine must be running
to
do
some
work,
make
sure the area
is
well-ventilated.
Newer
run
the engine
in
an enclosed
area.
The exhaust
contains
poisonous carbon
monoxide gas
that
may
cause
loss of
consciousness and
may
lead to
death.
Disconnect the starter relay
switch connector
remove
the
main
fuse (20
A).
Reconnect
the
connector onto the
relay
switch.
Connect
the
ammeter
as
shown.
Start the
engine
and
increase the
engine speed gradually.
CAUTION
-
Be careful not
to
short
any
tester probes.
•
Although
the current could be
measured
when
the
ammeter
is
connected
between
the battery
positive
terminal
and
the
positive cable, a
sudden surge
of
current
to
the
starter
motor could
damage the ammeter.
•
Always
turn the ignition
OFF when
conducting
the
test.
Disconnecting
the
ammeter
or
wires
when
current
is
flowing
may damage
the
ammeter.
Regulated Voltage:
13.5-14.0 V/1,500 rpm
Charging current
:
1
A
(3)
CONNECTOR
(11
MAIN FUSE
S
(2)
STARTER RELAY SWITCH
Regulator/Rectifier
System
Inspection
Remove
the
fuel
tank (page
2-4).
Disconnect
the
regulator/rectifier
5P connector.
Check the connectors
for loose or
corroded terminals.
Measure
the following
between
the
connector
terminals of the
wire harness
side.
Item Terminals
Specification
Battery
charging
line
Red/White
(
+
)
and ground
(
—
|
Battery voltage
should
register
Charging
coil
line
Yellow and
Yellow
0.2-0.6
0
(20°C/68°F)
If
the
charging
coil line
reading
is
out
of
specification, check
the alternator
(page
13-7).
13-6