Cessna 182 1978 - Landing and Taxi Lights

MODEL
182
& T182
SERIES
SERVICE
MANUAL
16-54.
TROUBLE
SHOOTING
(Cont).
TROUBLE PROBABLE CAUSE REMEDY
INSTRUMENT LIGHTS WILL Short
circuit wiring. 1. Inspect
circuit breaker. If
NOT LIGHT
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 lo-
cated. 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.
Faulty section
in dimming 4.
Lights will work when control
potentiometer.
is placed in
brighter position.
Replace potentiometer.
Faulty light dimming
5. Test
both transistors with
transistor.
new transistor.
Replace faulty
transistor.
Faulty selector switch.
6. Inspect. Replace
switch.
INSTRUMENT
LIGHTS WILL Open resistor
wiring in 1. Test for continuity.
Replace
NOT DIM minimum
intensity end of resistor
or repair wiring.
potentiometer.
Shorted transistor. 2. Test transistor by substitution.
Replaces defective transistor.
CONTROL WHEEL MAP Nav
light switch turned off. 1. Nav
light switch has to be
LIGHT WILL NOT LIGHT ON before map light will light.
Short circuit in wiring. 2. Check lamp fuse on terminal
board
located on back
of station-
ary
panel
with ohmmeter.
If
fuse is open,
proceed
to step 3.
If fuse is OK, proceed to step 4.
Defective wiring.
3. Test
circuit until short is lo-
cated.
Repair or
replace wiring.
4. Test for
open circuit.
Repair
or replace
wiring. If
a short or
open circuit is
not found, proceed
to step 5.
Defective
map light assembly.
5. Check voltage at map light
assembly with master and nav
switches
on. If battery
voltage
is present, replace map light
assembly.
16-55. LANDING
AND TAXI LIGHTS.
circuit breaker located
on the primary bus bar.
Two
rocker switches control the lights. The switches are
16-56. DESCRIPTION. The landing and taxi lights interconnected by two diods, when the taxi light
are mounted in
the lower half of the engine cowl. switch
is actuated only the left hand light is illumin-
Both lights are used for landing but only the
left hand ated. When the landing light switch
is actuated power
for taxi. Power for the lights is
supplied through a is supplied to the landing
light, and through the diods
16-40