wiring

G Landing Gear
GA Actuator
GB Retraction
GC Warning Device (Horn)
GD Light Switches
GE Indicator Lights

H Heating, Ventilating and Deicing
HA Anti-Ice
HB Cabin Heater
HC Cigar Lighter
HD De-Ice
HE Air Conditioner
HF Cabin Ventilation

J Ignition
JA Magneto

K Engine Control
KA Starter Control
KB Prop Sync.

L Lighting
LA Cabin
LB Instrument
LC Landing
LD Navigation
LE Taxi
LF Rotating Beacon
LG Radio
LH De-Ice
LJ Fuel Selector
LK Tail Flood

M Miscellaneous
MA Cowl Flap
MB Electrically Operated Seats
MC Smoke Generator
MD Spray Equipment
ME Cabin Pressurization Equip.
MF Chem. O2 Ind.

P Power
PA Battery Circuit
PB Generator Circuits
PC External Power

Q Fuel & Oil
QA Aux Fuel Pump
QB Oil Dilution
QC Engine Primer
QD Main Fuel Pumps
QE Fuel Valves

R Radio (Nav & Comm)
RA Instrument Landing
RB Command
RC Radio Direction Finding
RD VHF
RE Homing
RF Marker Beacon
RG Navigation
RH HF
RJ Interphone
RK UHF
RL LF
RM FM
RP Audio System and Amp
RR DME
RS Public Address

S Radar

U Misc Electronic
UA IFF (xpndr)

W Warning and Emergency
WA Flare Release
WB Chip Detector
WC Fire Detection System

X AC Power

Well, that wasn't so hard--Jerry