Snowmobile Yamaha Phazer PZ50W, PZ50GTW, PZ50FXW, PZ50MW, PZ50VTW, PZ50MPW. Manual - part 72

7-34

FI

8-1

–

+

ELEC

ELECTRICAL

SWITCH INSPECTION

SWITCH INSPECTION

Use a pocket tester to check the terminals for conti-
nuity. If the continuity is faulty at any point, replace
the switch.

NOTE:

• Set the pocket tester to “0” before starting a test. 
• When testing the switch for continuity the pocket

tester should be set to the “

× 1 Ω” range.

• When checking the switch turn it on and off a few

times.

Pocket tester:

90890-03112, YU-03112-C

INSPECTING A SWITCH SHOWN IN THE 
MANUAL

The terminal connections for switches (main switch,
handlebar switch, engine stop switch, light switch,
etc.) are shown in a chart similar to the one on the
left. This chart shows the switch positions 

a in the

column and the switch lead colors 

b in the top row.

For each switch position, “

” indicates the

terminals with continuity.

The example chart shows that:
There is continuity between the “Brown and Red”
leads when the switch is set to “ON”.
There is continuity between the “Brown and Red”
and between “Brown/White and Red/White” leads
when the switch is set to “START”.

OFF

ON

START

Br R Br/W R/W

R

Br

R/W

Br/W

b

a

SWITCH INSPECTION

8

8-2

–

+

ELEC

IGNITION SYSTEM

IGNITION SYSTEM

CIRC

UIT D

IAGRA

M

B

R

/L

(20A)

R

/W

R

/W

R

/W

O

R

/W

(BLACK)

O

O

O

B

L/

W

B

G

Lg

Y

(BLACK)

OFF

ON

START

W

W

W

W

W

W

B

/L

Gy

L

/W

Lg

G

L

L

/W

R

/W

R

/G

L/

W

(10A)

HI

LO

G

B

Y

G

B

Y

OFF

ON

R

B

R

R

W

W

Lg

Y

B

B

B

B

B

Y

G

Y

G

R

/G

R

R

R

R

B

B

B

CLOSE

OPEN

B

/Y

Ch

RUN

STOP

Br

/L

W

Br

R

B

Y

/R

B

/R

B

/R

Y

/L

Y

/L

Y

/W

Y

/W

Ch

B

/L

Y

/W

Y

/L

Ch

B

R

/Y

Ch

R

/B

B

Gy

(BLACK)

B

/L

Gy

Br

B

/W

R

Br

/L

W

Br

(GLAY)

WW

W

R

Br

Br

R

/W

L/

W

R

/Y

B

Br

/W

L

/W

R

R

B

B

R

R

L

/Y

B

/R

R

/W

L/

W

Br

/W

Br

Br

R

/W

B

/Y

B

/Y

Ch

B

/L

(BLACK)

(BLACK)

(BLACK)

(BLACK)

L

/YR

/B

Y

Ch

B

/R

R

/WG

/B

G

L/

R

B

LY

B

W

/Y

L

B

/L

P

O

/R

B

/W

W

/B

L

B

/L

(BLACK)

WL

B

(BLACK)

R

/LR

/B

R

/LG

/B

G

/WB

/L

R

/L

L

/R

R

/G

R

/W

L

/R

R

/L

R

/W

R

/G

Y

/G

Y

/G

B

G

G

Ch

Ch

G

/B

G

/B

R

/B

Ch

(GLAY)

(GLAY)

R

/Y

L

/R

L

/W

Br

B

R

R

R

B

B

(BLACK)

L

/W

R

/W

R

/W

L

/W

B

Lg

Y

/R

O

/B

L

/Y

G

/Y

B

/Y

L

/W

R

/W

R

/W

Y

/L

Br

/B

Y

/L

Y

/W

Sb

/W

G

/W

Br

/W

B

/L

G

/B

W

/B

W

/Y

P

/W

L

/R

R

/L

R

/B

Gy

/R

Gy

Br

/L

Y

/G

Lg

Lg

Y

L

W

P

B

O

B

Ch

R

/L

R

/L

G

/B

G

/B

G

/B

R

/B

B

R

/L

B

B

B

(BLACK)

B

/L

W

/B

L

B

/L

W

/Y

L

Y

B

/L

L

P

/W

B

/L

L

A

R

/L

R

/L

B

/L

G

/W

Br

/W

B

/L

L

P

/W

B

/L

L

/R

L

/R

R

/W

G

Lg

L

/W

Y

Y

W

G

/W

Gy

B

/YW

/YY

/W

W

/L

W

/RO

/B

Br

/B

B

/R

P

/WR

/L

Y

/G

Ch

B

/L

L

/Y

Lg

R

/W

Br

/W

L

/WP

Y

/L

L

W

/BR

/W

O

Y

/R

Y

/LG

/Y

Br

/L

L

/R

B

R

/B

Lg

B

G

/B

Gy

/R

Sb

/W

Br

/W

B

/L

(40A)

(20A)

(15A)

(3A)

(4A)

(7.5A)

R

/W

Gy

/R

R

/W

(BLACK)

A

Gy

/R

A

A

R

/B

R

/B

A

(BLACK)

(DARK GREEN)

L

P

B

/L

L

P

B

/L

Gy

/R

Gy

/R

C

B

/L

B

/L

C

G

/W

G

/W

W

B

C

Ch

Ch

Ch

A

(BLACK)

(BLACK)

W

Lg

Lg

(BLACK)

(GRAY)

Y

B

/L

L

(BLACK)

(GRAY)

R

/L

R

/L

B

(BLACK)

R

B

(BLACK)

(GRAY)

(BLACK)

(BLACK)

B

R

/L

(BLACK)

E

W

/R

W

/R

E

W

/L

W

/L

W

/R

W

/L

B

/R

W

/R

W

/L

B

Y

/R

B

Y

/R

Br

/R

G

/Y

L

R

/W

Br

/R

Br

/R

L

L

L

R

/W

G

/Y

B

L

B

L

(BLACK)

W

W

O

/B

O

/B

B

R

/G

W

/B

G

B

O

/B

L/

R

G

B

/R

B

Y

/R

B

Y

/R

B

G

L/

R

G

B

Ch

G

/B

Lg

B

W

B

B

B

B

B

B

B

Y

/R

B

/R

B

B

O

/B

L

/R

LO

OFF

HI

G

/R

O

/B

Y

/L

(BLACK)

G

/R

O

/B

Y

/L

(BLACK)

G

B

Y

G

/R

B

Y

/L

G

B

Y

G

/R

B

Y

/L

D

B

B

O

/B

Y

/L

G

/R

Y

/L

Y

/L

G

/R

G

/R

B

B

Y

/L

O

/B

L/

R

L/

R

Y

/L

O

/B

L

/R

L

/R

D

O

/B

O

/B

Br

/B

Y

/R

R

/G

Br

/R

R

/G

(BLACK)

Sb

/W

R

/G

R

/G

B

Sb

(BLACK)

Sb

/W

L/

B

Y

/R

B

Br

/R

Sb

L/

B

E

Sb

Sb

Sb

R

/G

R

/G

R

/G

Y/

R

B

B

R

/G

Y/

R

Br

/B

Br

/R

Sb

Sb

/W

Sb

/W

L/

B

L/

B

Br

/R

E

L/

B

L/

B

E

Br

/R

Br

/R

D

L

/R

L

/R

D

G

G

F

G

G

F

F

Y

Y

L/

R

O

/B

Br

P

(BLACK)

|

M

L

K

Z

BC

E

E

7

6

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9

g

j

u

t

s

s

2

4

3

i

y

z

{

~}

5

A

k

F

G

Y

X

T

S

V

U

R

O

P

Q

8

J

N

h

W

b

a

d

L

m

n

o

p

q

r

l

1

D

HI

EE

w

v

x

e

f

f

c

[

\]

^

Ë

É

Ê

Í

Ì

È

E

WIRE HARNESS

GEAR MOTOR

SUB-WIRE

HARNESS

F

WIRE HARNESS

HEADLIGHT

SUB-WIRE

HARNESS

YG

B

Y

G

B

D

WIRE HARNESS

SUB-WIRE

HARNESS 3

B

O

/B

GL

/R

BO

/B

G

L

/R

B

WIRE HARNESS

FUEL PUMP

SUB-WIRE

HARNESS

R

/L

B

C

WIRE HARNESS

SUB-WIRE

HARNESS 2

B

/L

G

/W

Ch

B

/L

G

/W

Ch

A

WIRE HARNESS

SUB-WIRE

HARNESS 1

R

/W

O

R

/B

Gy

/R

G

/BR

/L

R

/W

O

R

/B

Gy

/R

G

/B

R

/L

ÈÈ

W

/R

Br

/R

L/

B

Sb

W

/L

W

/R

Br

/R

L/

B

Sb

W

/L

8-3

–

+

ELEC

IGNITION SYSTEM

IGNITION SYSTEM

CIRCUIT DIAGRAM

1 Crankshaft position sensor
4 Main switch
5 Main fuse
0 Battery
B Engine stop switch
C Throttle switch
J ECU (engine control unit)
K Cylinder-#1 ignition coil
L Spark plug
M Cylinder-#2 ignition coil
R Throttle position sensor
y Ignition fuse