Honda Motorcycle Service Manual page 351

ELECTRICAL FUNDAMENTALS
3. If there is no voltage at
O
and
0,
check voltage at
O
and
@ in a similar manner.
If there is no voltage at
O
and
3,
check wiring between
the ignition switch and the battery.
If there is voltage at
O
and
@,
check for a broken wire or
a short circuit in the wire harness. Replace the wire harness
with a new one if necessary.
If there is voltage at @and not at
( $ 1 ,
then check connector
B for looseness.
Example 2
I
Sometimes it is easier to diagnose a component by measuring
voltage directly at the input terminals.
Please, the (+) probe voltage at the positive input terminal
and the(-)probe at the ground wire of the component.
If no voltage is measured, there are three possible causes.
@
Faulty battery: Check between the batterys positive wire
and groud.
O
Open circuit between battery and positive terminal: check
for any intermediate circuits (i.e.,switches).
O
Loose/shorted ground wire: Check for a secure grounding;
check for continuity of the wire itself.
Example 3
For instance, if a light buib blows out frequently, the system
system is working correcrtly.
For instance, if a light buib blows out frequently, the system
needs to be checked with an AC voltmeter to see if excessive
voltage is apparent. In this case, measure the AC voltage of
the terminals to the light bulb to see if it is within the specified
voltage range.
LIGHT SWITCH
.
REGULATOR
LIGHTING
GREEN COIL
Date of Issue : March, 1995
0
HONDA MOTOR CO..LTD.
21-1
5