Inspection Of Charging System Components - Suzuki GS-1000 Service Manual

ELECTRICAL SYSTEM
INSPECTION
OF
CHARGING
SYSTEM COMPONENTS
Rectifier
A
total of 6 semi-conductor elements are
con-
nected as
shown.
for full-wave rectification.
They are encapsulated into a
mold and con-
tained in a compact
case.
Each element is con-
ductive
in the forward direction and non-con-
ductive in the
reverse
direction. Check each ele-
ment
for this property
of
ditectionality with
a
tester. as follows:
I
1.
Undo all the terminal connections
on
the
rectifier, disconnecting the lead wires corn-
ing from the alternator
(YELLOW,
WMITEJRED
and
WHITE/BLUE), from
the battery (RED) and
from
ground
(BLACK/WHITE).
2. Put the minus
(-)
probe pin of
the
tester
on to ground terminal (BLACRIWHTTE),
and the positive
(-t )
pin on to YELLOW,
WHITE/RED and WHITE/BLUE, se-
quentially in that order. The
tester should
indicate continuity for each.
Repeat this process with
minus
(-) pin
and plus ( + ) pin swapped: the tester
should not indicate continuity.
Fig.
II-14.
RED
3. You have
just
checked the three rectifier
elements. Check the other three
in
the
I r
1
same
way
by putting one
of
the
probe pins
on
to
the output
terminal (RED).
If any one of the elements is found to
be
non-conductive in the forward direction or
conductive in the reverse direction, replace
the rectifier unit.
WHITE/RED
YELLOW
-
- - = - - . = .
-- -
-
_--
U -
CA UTI0.V:
I ) Be sure
la
discotrnect he ortrpur lead
wire in order
10
cul
oflthe reciij?e~'fiom
!he
burrery side. Checking
[he recrl$er
with this lead wire conrtecred may
cause
!he element ro
get
bunred due
ro
possibl~
yrounding.
Wever use
a megger-fjye insrrumenr ro
:heck fir conlinuify:
Be
sure
to
use
rircuir rester.
A
megger could suprure
the recrzJier ele~nwt.
3)
.?Vt-rer increase engive speed when the
ourput
lead
wire (RED) has been
discora~ecled or rhe rectifier ekmenrs
will be
btrrnr
and damaged.
?
wHITE/RLUE
$LACK/WHITE
It should be borne in mind that, when the circuit
tester is used for checking ohmic resistance or
continuity.
its internally contained battery
becomes
connected
to the
probe pins: plus
(
+
)
polarity appears on negative
(-) pin and
minus
(-1
polarity
on
positive
-t
) pin,
Alternator
Disconnect the yellow and white blue leads from
the regulator.
1.
Disconnect the white blue lead from the
alternaotr. Connect
the (
+
)
terminal of
the tester to the red, and its
(-) terminal
to the (-)
terminal of the battery. The
coils
@
and
0)
are good
if the tester reads
16.5V or
more at 5,000 rpm.