Cessna 182 1978 - Page 445

MODEL 182
& T182
SERIES
SERVICE MANUAL
16-54.
TROUBLE
SHOOTING
(Cont).
Extreme care
should be taken
when exchanging
flash tube.
The tube
is fragile
and can easily
be cracked in
a place where
it will not be
obvious visually. Make sure
the tube is seated properly
on the base
of
the nav light
assembly
and is centered
in the
dome.
NOTE
When checking
defective power
supply and
flash tube,
units from
opposite
wing may
be used.
Be sure power
leads are
protected
properly
when unit
is removed
to prevent
short circuit.
ONE ANTI-COLLISION
Defective Strobe Power
Supply, 1. Connect
voltmeter to red lead
be-
STROBE LIGHT
WILL
or flash tube.
tween aircraft
power supply (battery/
NOT LIGHT.
external
power) and strobe power sup-
ply, connecting negative lead to wing
structure.
Check for
12 volts thru
1977 models,
and 24 volts
beginning
with 1978 models.
If OK proceed
to
step 2.
If not. check aircraft
power
supply
(battery/external
power).
2. Replace
flash tube
with known
good flash tube.
If system
still
does not
work, replace
strobe
power
supply.
1. Inspect circuit
breaker.
If
DOME LIGHT
TROUBLE.
Short circuit
in wiring.
circuit
breaker
is open,
proceed
to step 2. If circuit breaker is
OK, proceed
to
step 3.
Defective
wiring.
2. Test circuit
until short
is
located. Repair or replace
wiring.
3. Test for open
circuit.
Repair
or replace wiring.
If no short
or
open circuit
is found,
proceed to
step 4.
Lamp burned
out.
4. Test lamp with ohmmeter
or
new lamp.
Replace
lamp.
Defective
switch.
5. Check
for voltage at
dome
light with master and dome light
switch
on. Should
read battery
voltage. Replace switch.
16-39