Cessna T188C - Page 487

MODEL
188
&
T188
SERIES
SERVICE
MANUAL
QD
- Main
Fuel
Pumps
RM-
Frequency
Modulation
QE
- Fuel
Valves
RP
- Audio
System
and
Audio
Amplifier
R -
Radio
(Navigation
and Communication)
RR -
Distance
Measuring
Equipment
(DME)
RA -
Instrument
Landing
RS - Airborne
Public
Address
System
RB - Command
S - Radar
RC
- Radio
Direction
Finding
U -
Miscellaneous
Electronic
RD - VHF
UA -
Identification
- Friend
or Foe
RE
- Homing
W -
Warning
and
Emergency
RF
- Marker
Beacon
WA
- Flare
Release
RG
- Navigation
WB - Chip
Detector
RH
- High
Frequency
WC
- Fire
Detection
System
RJ -
Interphone
WD
- Low Level
Fuel
RK - UHF
WE -
Vacuum
Warning
System
RL
- Low
Frequency
X - A.
C. Power
BASE
FUNCTION
GAUGE
COLOR
STRIPE
CIRCUITS
(or
solid)
COLOR
16
Red
Ncne
18
Red
Black
A+
Power
Red
White
20
Red
Green
22
Red
Yellow
Ground
16
Black
None
18
Black
White
Mike
Ground
22
Black
None
Radio
Lights
Dim
18
Yellow
None
Mike
Audio
22
Tan
None
Tan
(Shielded)
None
Mike
Key
22
White
Black
Radio
Speaker
20
Green
None
Headphones
22
Blue
None
Dev
+
0
22
Gray
Red
Dev
- *
22
Gray
Green
*"Dev+"
and
"Dev-"
circuits
are
for
use with
autopilots
and
any
associated
omni
indicator
circuit
to which
it
connects.
Where
additional
colors
are required,
red/white
may
be
used
for "Dev+"
and red/black
for "Dev-".
NOTE
All
other
color
coded
wires
are
for general
use
in multi-
conductor
radio
and
autopilot
harness
assemblies.
Effectivity
of
diagrams
are
designated
as
follows:
Elf
thru (SRXXXX)
denotes
effectivity
to
the serial
number
prior
to the
(SRXXXX)
serial.
(SRXXXX)
& on
denotes
effectivity
for the
(SRXXXX)
serial
and
on.
Diagrams
and/or
portions
of, may
be
individually
serialized
and
not designated
by a
(SRXXXX)
number.
20-3