Cessna 177 SERIES Service Manual page 275

16-50. TROUBLE SHOOTING (Cont).
TROUBLE
PROBABLE CAUSE REMEDY
BOTH ANTI-COLLISION Faulty power supply.
Listen for whine in power supply
STROBE LIGHTS WILL
to determine if power is operating.
NOT LIGHT. THRU 1972
MODELS (Cont). Faulty switch. Test for continuity.
Repair or
replace.
Faulty wiring.
Test for continuity. Repair or
replace.
WARNING
The anti-collision system is a high voltage device.
Do not remove
or touch tube assembly while in operation.
Wait at least 5 minutes
after turning off power before starting work.
BOTH ANTI-COLLISION
Open circuit breaker. 1. Check, if open reset. If
STROBE LIGHTS WILL
circuit breaker continues to
NOT LIGHT. (1973 MODELS
open proceed to step 2.
& ON.
2. Disconnect red wire be-
tween aircraft power supply
(battery/external power) and
strobe power supplies, one
at a time. If circuit breaker
opens on one strobe power
supply. If circuit breaker
opens on both strobe power
supplies proceed to step 3.
If circuit breaker does not
open proceed to step 4.
3. Check aircraft wiring.
Repair or replace as neces-
sary.
4. Inspect strobe power sup-
ply ground wire for contact
with wing structure.
16-16 Change 6