Cessna T188C - Page 343

MODEL
188
& T188
SERIES
SERVICE
MANUAL
16-54. TROUBLE SHOOTING (Cont.)
TROUBLE PROBABLE CAUSE REMEDY
FLASHING BEACON
DOES Short circuit
in 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.
Lamp
burned out.
3.
Test lamp with ohmmeter
or
a new lamp. Replace lamp. If
lamp
is good,
proceed
to step 4.
Open
circuit in wiring.
4.
Test circuit from
lamp to
flasher for continuity. If no
continuity
is present,
repair
or
replace wiring. If continuity is
present, proceed to step 5.
Defective
switch.
5.
Check voltage at flasher
with
master
and
beacon
switch on.
Should read battery voltage.
Replace switch. If voltage is
present, proceed to step 6.
Defective fasher. 6. Install new flasher.
FLASHING BEACON Defective flasher. 1. Install new flasher.
CONSTANTLY LIT.
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 locat-
ed.
Repair
or replace
wiring.
3. Rest for open circuit. Repair
or replace wiring. If no short or
open circuit is found, proceed to
step 4.
Faulty
section in
4.
Lights will work when
control
dimming potentiometer. is placed in brighter position. Re-
place potentiometer.
Faulty light dimming 5. Test both transistors with new
transistor.
transistor. Replace
faulty transis-
tor.
16-39