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5)
ELECTRICAL SYSTEMS
BATTERY
10 -1 9
3. Tur n ig
nition
swit ch
on
and crank t
he
engine
for just a few
seconds while
quickly
not-
ing voltmeter
reading.
The voltage drop across
the battery positive
cable
and
terminal con-
nections
should
not exceed
VI
o
volt.
4.
Conn
ect
voltmeter
pos
itive
lead to ground
on eng ine. Attach prod to voltmeter negative
lead
and
apply
the prod to
center
of battery
negative
(
-)
post. The volt age drop across
th
e battery
ground
cable
and terminal connec-
tions while cranking
engine
should not exceed
t;;
0
volt .
5.
Remove jumper
wire
from distributor
and turn ignition off as soon as test is finished
.
6.
A reading in excess of
VI0
volt
when
t
esting either
battery
cable indicates excessive
resistance in
cable
or
connections. Clean
and
tighten cabl
e
terminals (s
ubpar.
d, below) and
recheck for
voltage
drop.
If
voltage
drop
still
exceeds
V
lO
volt
replace
cable with a
genuine
Buick
cable to insure
ample capacity.
Fig
ure 10 - 9 - Rem o ving
Corroded Termina l
wi
th
Puller
d.
Cleaning
Cable
Terminals
If loose
connections are
f
ound
by inspection,
or high r
esistan ce is
found by
voltage
t
est,
dis-
connect
the cabl e
for
thorough cleaning of
t
er-
minals. Wh
en
r
emoving
a
corroded cable
ter-
minal from battery post do not pry
against
battery
case
or hammer on terminal to break it
loose,
si
nce
either
practice
will result in broken
cell
covers.
Use a screw type
term inal puller
if
terminal cannot be loosened by hand
after
clamp bolt is fully loosened. See
figure
10-9.
CAUTION: It is
advisable
to
always dis-
connect th
e ground cable
from
battery first,
and
connect it to battery
last,
to avoid th
e
possibil-
ity of
shorting
to ground with the
wrench w
hile
working on
t
he
less accessible connections
of
th
e positiv e
cable. A
wrench shorting
to ground
from either end of
positive cable w
ould
carry
high
amperag e
and
heat quickly,
causing ser-
ious bu
rn s
on th
e
hand.
Figu re
10-1 a-
Wi re
Brushes
for Clea ni ng Battery Posts and
Terminals
Thoroughly clean all
corrosion from
discon-
nected
battery cable
termi nals and t
erminal
posts, using
suitable
wire
brush es
(fig.
10-10) ;
do not scrape the p
r ot ecti ve lead coating
from
t
erminals.
If
wir e
b
rush es are not
a
vailable,
cor r oded t
erminals
may
be
cleane d
by brushing
with a strong solution , using ca
r e not to get
solution into
batter y
cells .
e
.
Conne cting
Battery
Cables and Winding
Clock
The electric
clock
requires
spec
ial
attention
w
hen r
econneciin q a bat tery
that
has been dis-
connec ted
f
or
an
y
r
eason
,
a clock that has been
dis
conn ected, or when r
eplacing
a blown
clock
fu
se.
IT IS
VE RY IMPORTANT
THAT THE
INITIAL
WI
N D BE
F
ULLY
MADE. To
be
certain
of
t
his, recon nec t
battery
ca bles as fol-
lows:
1. Make sure that all
other instruments
are
off.
2. Conn
ect one
ca ble
(preferably positive)
t
o
battery.
3. Befor
e
con nect ing
the
last
cable t
o
bat-
t
ery,
t
ouch th
e te
r
minal
t
o
its post
on battery.
Immediately
afterward st ri ke
the
t
erminal
against
ba
tter
y
pos
t t
o
see
if th
ere
is a spark.
If
there is, a
llow th
e
clock
t
o run down until
it stops
ticking,
and r
ep
eat
as
above
until there
is no spark. Th
en immediately make
the
per-
manent conn
ection before
th
e
clock can again
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