Table of Contents
Advertisement
Testing
VoltaQ8
at Headlights
One
of the
factors affecting headlight
efficiency
is
voltage.
H
eadlight
voltage
m
ust
be
measured
with
the lights burning.
Remove headlight rim
and,
with
sealed beam
unit partially
r
emoved
Crom
its mounting
seat,
attach leads
of
a
reliable voltmeter
to prongs of
sealed beam
unit
while
it is
still
inserted in con-
nector socket.
With sealed beam unit
in
its conect position,
top pl'ong
supplies
current
fo
r
low
(traffic)
heam. One of
the
side
prongs
supplies
current
for
the high beam
and the other
is
the ground
connection
.
After
engine
has been
stopped
and lights
have bu
r
ned fo
r
five minutes, volt.age
at
head-
lights
(with high
filament
bun/iny)
should
not
be less
than
11.25 volts. With
lights
burning
and engine
warmed up and running
at a speed
equivalent to a
car
speed of aboul 20 mph,
volt-
age at headlights
should
be
not less than 12.3
vo
lts,
no,·
mor
e than 13.5 volts (with
battery
and $tenerator at
room
temperature,
appr
oxi-
mately 70 degrees F.).
GFNfU,!OR RE(;lIlAIOl
_ _
0
0
If
voltage is low at either
headlight
socket
(w
ith only standard
equipment
in the
ci
r
cuit),
proceed as follows:
Test voltage output of battery
-
it
should be
12 to
]
2.5
valls.
Clean
and tighten battery
ter-
minals and ground cable
.
Check
wires
and
con-
nections to
all
lights,
main
headlight
switch,
and
dimmer
s\vitch fo
r
high resistance. Wh
en
a
voltmeter is
placed
between
ground and input
side of a switch and
then
between
ground
and
output
s
ide
of switch
(with
lights burning).
the
difference in
readings
wi!!
represent vo
ltage
drop in
sw
itch. The same
method
may be u!Sed
in
checking
vollage drop in \vire>l
by taking a
reading
at each end
of wire. A switch
showin$t
a voltage
drop of
more than one-tenth of a
volt
0
1'
a wire showing
a
voltage drop of one-tenth
of a volt, shoul
d
be
replaced.
If
any
wire
in the
lighting
circuit
has
been
r
eplaced
with
other
than standard
equipment wire,
it
may
lack
ca-
pacity and
cause
volUige
drop.
The
most
im-
portant
wire in entire
primary
circuit
is the
wire
that
is
connected
f
r
om
the
sta rter switch
to
ammeter,
because it
mll.':it
carry the full load
of all branching
circuits.
@-ElKUIC
HMPf.u,
run SlNDII-K>
UNIT
11
BtAC
K
Sd
.
fUEl
GAUGE
f'OWU ... NTENN ...
t\NpNN'"
C"'Btl
ANnNNt\
SWITCH
.
12
REO
!~
AMPEll
CIRCUIT BRlt\KER
UB/OWN
12
&t
...
C~
/3
""OW"
."~".,,
~O
,\'
~
C',?,
<ID0
" ' ' ' ' ' "
" '
,w'''p
...
MMETH
~V
CI(;d
UGtlfER
TEMPEIt\IUU
GAIJGE
1~
UOWN
II>
GRE£N
...
~1
~8lUE
I
I
t~)
18
Bt"'CK
0
0
9 "'MPH! fUSE/
\
R
... OIO
16 G
UEN
-
SidTER
...
NO
IGNIIION
SWITCH
)).-"
8
... MPERE
CIRCUIT BREt\KEI
16
GREEN~ RE.d
OF
FRONT Sf
... 1 CIG ....
liGHTER
18
BtU!
r
l 8
WHiff
Fun
(;"'!JG[
I
....
NK UNIT
E51
....
1E W"'OON ONLY
Fig. 16
-
Instr
umen
ts
and Access. Circui
t
Wiring Diagram
(C-71 , (,72,
C-73,
(-70)
4l
Hide quick links:
Advertisement
Table of Contents
