Regulator/Rectifier - System Inspection - Honda Nighthawk CB 750 1991 Service Manual

Charging SysternlAlternator
-
If the engine must be running to do some work,
make sure the area is well-ventilated. Never run the
engine i n an enclosed area.
-
The exhaust contains poisonous catlmn monoxide
gas that may cause loss of consciousness and lead
to death.
Disconnect the starter relay switch connector remove the
main fuse (30A). Reconnect the connector onto the relay
switch.
Connect the ammeter as shown.
I
I
Start the engine and increase the engine speed gradually.
CAUTION
Be careful not to short the 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 amme-
ter
.
Always turn the ignition OFF when conducting the
test. Disconnecting the ammeter or wires when
current is flowing may damaae the ammeter.
Regulated Voltage
:
:
13.0-1 5.0\1/2,000 rpm
Charging current
:
B e l o w 0 . 5 A
System Inspection
Disconnect the regulatorlrectifier 6P connector.
Check the connectors for loose or corroded terminals
Measure the following between the connector terminals of
the wire harness side.
I
Item
I
Terminals
I
Specification
I
charging
Battery voltage
and ground
(-)
should register.
Charging
Yellow and Yellow
0.4-0.6
n
coil line
1
(2m16B.F)
"'Itage
detection
line
If the charging coil line reading is out of specification, check
the alternator (page 13-7).
Black
(+)
and
ground
(-)
Field
coil line
When the ignition swi-
tch is ON, battery vol-
taw
should re~ister.
White and Black
2.1-2.6
n
(20%/68'F)