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Trouble
Shooting
SYMPTOMS
PROBABLE
r
AUSE
ACTION TO BE TAKEN
Battery
In
low
state
of
charge
shown
by
Dynamo
not
chargIng
when runntng
at
about
lack of power when starting
20
mph
30 km WIth swItched
on
lights
Broken
or
loose
connectIon
In
Examine
charging
and
field
CIrcuIt
dynamo
CirCUIt
or
regulator
not
wiring
TIghten
loose
connectIons
or
functIonIng
correctly
replace
broken
lead
Partlcu
larly
examine
battery
connectIons
Examine
regulator
Commutator greasy
or
dirty
Clean
WIth
soft
rag
mOIstened
In
petrol
GIVing
low
or
Intennittent output
when
car IS
running
In
top gear
Dynamo
belt sli pplng
Adjust
belt
tensIon
Loose
or
broken
connectIons
In
Examine
charging
and
fIeld
CirCUIt
dynamo
CirCUIt
wiring
TIghten
loose
connectlotl
or
replace
broken
lead
PartIcularly
Inspect
battery
connections
Brushes greasy
or
dirty
Clean
WIth
soft
rag
mOistened
In
petrol
Brushes
worn or
not
fitted
correctly
Replace
worn
brushes
See that the
brushes
bed
oronerlv
Regulator
not
functlomng
correctly
ExamIne
regulator
Battery
overcharged
shown
by
burnt
out
bulbs and
very
frequent
Regulator
not
functIoning
corre
tly
Examine
regulator
need for tOpping up
Starter does
not
operate
or
operates
Poor
contact
of
starter
swItch
contact
Check sWItch and
replace
If necessary
and does
not turn
the engine
POints
Poor brush
contact
Replace
brushes
or
spnngs
Burnt
commutator
Overhau I
starter
motor
or
clean
commutator
Shorted field COIl
Replace
COIl
Shorted
armature
Replace
armature
Poor
contact
of
battery
leads
Clean and
tIghten
leads
Weak
battery
Recharge battery
Open
CI
rcUlt
between
starter
SWitch
Check wlrtng and
replace
If necessary
and solenOId
Poor earth
connectIon
Check and
rectI
fy
Starter
motor
operates
but
Drive plnton defectIve
Replace
drove pinIon
does
not
seem
to
turn
over
engine
qUIckly
enough
Flywheel
ring gear
worn
Replace flywheel
or
recondition ring
gear teeth
IgnItIon
wamlng
lamp
goes
out
only
Generator
faulty
Repair
generator
at
hi
gh
rpm
Regulator
fau
Ity
Replace
regulator
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