Yamaha F50A Service Manual page 396

Wiring diagram (applicable for tachometer, trim meter or warning buzzer)
F50TH/F50AEHT*
1 Battery
2 Power trim and tilt motor
3 Power trim and tilt relay
4 Starter motor
5 Fuse (20A)
6 Neutral switch
7 Starter relay
8 Prime Start
9 CDI unit
0 Charge coil
A Lighting coil
B Pulser coil
C Rectifier Regulator
D Thermoswitch
E Oil pressure switch
F Engine start switch
G Engine shut-off switch
H Power trim and tilt switch
I Trailer switch
J Trim sensor
K Ignition coil
L Spark plug
Color code
B : Black
Br : Brown
G : Green
L : Blue
Lg : Light green
O : Orange
P : Pink
R : Red
Sb : Sky blue
W : White
Y : Yellow
B/O : Black/orange
B/W : Black/white
B/Y : Black/yellow
G/R : Green/red
G/W : Green/white
Gy/B : Gray/black
P/B : Pink/black
P/W : Pink/white
W/B : White/black
W/R : White/red
Y/B : Yellow/black
Y/R : Yellow/red