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308
CHA PTE R ELEVEN
8.
Shift
the
transmission into
neutral.
•
•
+
o
Negative
battery cable
+
12-voll battery
CD
2.
Test the
battery specific gravity
as descr ibed un-
der
Battery' Testing
in
Chapter
Three.
Charge or
re-
place
the
battery
as
required.
3. Co
nnect a
0-20 DC voltmeter to the
battery ter-
minals.
Connect an induct
ive tachometer to the
spark plug
following
the
manufacturer 's
instruc-
tions.
4.
Start
the en
gine and
increase
engine speed
to
4000 rpm.
Read the
voltage indic
ated
on the
volt-
meter. It should be between 13-
14.6 vo
lts.
Note
the
followi
ng:
a.
Charging
vo
ltage
co
rrect:
The
cha rging
sys-
tcm
is
opera ting prop
er
ly.
b. C
harging voltage
incorrect: Test the
stator
charge co
ils
as
described
under
Alternat or
Stat
or
in
this chapter.
Rep
lace
the
stator
co
ils
if
they are defective.
If
the
chargi ng
co
ils
are
good, perform Step
5.
5.
Check the
c
harging
system
wiring
harness
and
connectors
for
dirty
or loose-fitting
terminals:
clean
and
repair
them as required.
I
f the ",'iring
harness
and connectors arc
acceptable
and
no
problem has
been
found
aft
er
perform
ing the previous
tests,
con-
side r
the
regulator/rectifier
to
be defective
by
a
pro-
cess
of
elimination.
Install a regulator/rectilier unit
that
is
known
to
be
in
working order,
then retest
the
charging system.
Charging
Sys
te m Amperage Test
This
test
determines
when
the charging
system
overcomes
all electrical system
loads and
begins
to
charge
the
battery.
I.
Place the
vehicle on
leve
l
gro
und and
se
t
the
parking
brake.
2.
Test
the
bauery
specific gravity
as described
un-
der
Ballet}'
Test ing
in
Chapter
Three.
Charge or re-
place the
batt
ery as requ ired.
3. Disconnect
the
negative battery
cable
as de-
scribed in
this
chapter.
4.
Connect
a DC ammeter
in series with
the nega-
tive
battery
term inal
and the
disconnected negative
cabl
e (
Figure
5).
5.
Connect an inductive
tachometer
to
the
spark
plug following
the
manufacturer's instructions.
6.
Tum
both the key
switch
and the auxiliary shut-
01T switch
to the ON position.
7. The
ammetershould
read negat
ive amps
(battery
discharge).
Reverse the
ammeter test leads
if
the
ammeter
reads
positive.
CAUTION
Do
not
start the
engine
with
the elec-
tric s
tarter
as the ammeter
will
be
damaged.
9.
Start
the
engine with
the recoil
starter and
slowly increase
engine speed.
10.
Observe the
ammeter and
tachometer
and note
the
engine speed
when
the ammeter
reverses
and the
battery
starts
to
cha
rge.
Thi
s
should
occ
ur at
ap-
prox
imate ly
1500
rpm
.
II
.
Tum
the headlight
O
N
and appl
y
the brake to
turn
the brake light
ON.
12. Once
again slowly
increase engine
speed.
13.
Observe the amm
eter
and
tachometer and
note
the
engine
speed
whenthe
ammeter reverses andthe
battery starts
to
charge.
This
should occur at ap-
proximate ly
3000 rpm
.
14.
If the
charge
syslem
fails
either
of these
tests,
check
the
resistance
ofthe
charging
coils.
described
under
Batt ery
Charge
Coil", Testing
in
this chapter.
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