Cessna T188C - Page 344

MODEL
188
& T188
SERIES
SERVICE
MANUAL
16-54.
TROUBLE
SHOOTING
(Cont.)
TROUBLE
PROBABLE
CAUSE
REMEDY
INSTRUMENT
LIGHTS
WILL
Faulty
selector
switch.
6. Inspect.
Replace
switch.
NOT
LIGHT
(Cont.)
INSTRUMENT
LIGHTS
WILL
Open
resistor
wiring
1.
Test
for
continuity.
Replace
NOT
DIM.
in
minimum
intensity
end
resistor
or repair
wiring.
of
potentiometer.
Shorted
transistor.
2.
Test
transistor
by substitution.
Replace
defective
transistor.
ONE
WING
TIP
TURNING
Lamp
burned
out.
Replace
lamp.
LIGHT
OUT.
Defective
wiring.
Repair
or replace
wiring.
Spray
light
circuit
breaker
Reset.
open.
BOTH
WING
TIP
TURNING
Defective
wiring.
Repair
or replace
wiring.
LIGHTS
OUT.
Defective
spray
light
switch.
Replace
switch.
Defective
switch
on
grip.
Replace
switch.
Defective
relay.
Replace
relay.
ONE
SPRAY
LAMP
OUT.
Lamp
burned
out.
Replace
lamp.
Defective
wiring.
Repair
or replace
wiring.
Defective
relay.
Replace
relay.
BOTH
SPRAY
LAMPS
OUT.
Defective
wiring.
Repair
or replace
wiring.
Defective
power
switch.
Replace
switch.
Defective
switch
on grip.
Replace
switch.
ONE
SPRAY
LAMP
WILL
NOT
Defective
wiring.
Repair
or
replace
wiring.
EXTEND
OR RETRACT.
Defective
power
unit
relay.
Replace
relay.
Defective
power
unit.
Replace
power
unit.
BOTH
SPRAY
LAMPS
WILL
NOT
Defective
switch.
Replace
switch.
EXTEND
OR
RETRACT.
16-55.
LANDING
AND
TAXI LIGHTS
(WING MOUNT-
16-56.
DESCRIPTION.
The landing
and
taxi lights
ED.)
may
be
mounted
in
the
leading
edge
of the
left
wing.
16-40