Troubleshooting Headlight - Datsun 510 Workshop Manual

B1ectrical
SpteJD
TROUBLE SHOOTING HEADLIGHT
Condition
Probable
cause
Corrective action
Head lamps dim
Partly discharged battery Charge battery
engine
idling or
Defective cells in
battery Replace battery
shut
off
High resistance in light circuit
Check head
lamp
circuit
including
ground
connection
Make necessary repairs
Faulty
sealed beam units
Replace
sealed beam units
Head lamps dim High istance light ci rcuit Check
lighting
circuit
includ
engine running
ground
connection
above idle Make
necessary
repairs
Faulty
sealed beam units
Replace
sealed beam units
Faulty voltage
control unit Test
voltage
control and
generator
Make necessary
repairs
Lights
flicker Loose connections
or
damaged Tighten
connections and check for
wires in
lighting
ircuit
damag
d
wiring
Light
wiring
nsulation
damaged Check light wiring and replace
or
producing
momentary
short
tape
damaged
wires
Lights burn
cut High oltage regulator
setting
Adjust voltage regulator
frequently
Loose cOIUlections in lighting Check circuitCor loose connections
circuit
LIght
will
not
Discharged battery Recharge battery
and correct
light
cause
Loose connections in lighting Tighten
connections
circuit
Burned out bulbs
Replace bulbs
or sealed beam
unit
Open
or
corroded contacts in
light Replace lighting
switch
ing
switch
Open
or
corroded contacts in turn
Replace
turn
signal
and
lighting
signal
and
lighting
switches switches
Slop
lamps
will Switch
faulty
Replace
switch
not
light
Wires broken disconnected
or
Make
necessary
repairs
loose
Bulb burned out
Replace
bulb
Loose connection
or
poorly ground
Tighten loose
connectIon
or
pro
od
lamp body
perly ground tamp body
Burned out fuse
Check for shorts and
replace
fuse
Turning signal Faulty
n sher unit Replace flasher unIt
lamps light
with
Burned out
parking
or
tail lamp
on
Replace
bulb
out btinklng
that side
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