Snowmobile Yamaha Phazer PZ50W, PZ50GTW, PZ50FXW, PZ50MW, PZ50VTW, PZ50MPW. Manual - part 77

8-20

–

+

ELEC

CHARGING SYSTEM

TROUBLESHOOTING

1. Connect:

• Pocket tester

(to the battery terminals)

2. Measure:

• Battery voltage

OK

BATTERY IS NOT CHARGED.

Battery voltage:

more than 12 V at 20 °C (68 °F)

OUT OF SPECIFICATION

• Check the battery.
• Replace and/or charge the battery.

Refer to “BATTERY INSPECTION” in CHAP-
TER 2.

3. Start the engine and accelerate to 5,000 r/min.

NOTE:

Place the machine onto a suitable stand to raise
the track off of the ground.

4. Measure:

• Charging voltage

CAUTION:

Never disconnect the battery cables while the
generator is operating; otherwise, the rectifier/
regulator will be damaged.

OK

Charging voltage:

14 V/5,000 r/min

OUT OF SPECIFICATION

• Check the main fuse.

Refer to “FUSE INSPECTION” in CHAPTER 2. 

• Check the stator coil.

OK

FAULTY

Replace the main fuse and/or the sta-
tor coil assembly.

Replace the rectifier/regulator.

OK

Correct the connector.

Check the charging system’s wiring.
Refer to “CIRCUIT DIAGRAM”.

FAULTY

Properly connect or repair the charging system’s
wiring.

8-21

–

+

ELEC

CHARGING SYSTEM

BATTERY

Inspection

1. Inspect:

• Battery condition

Refer to “BATTERY INSPECTION” in CHAP-
TER 2.

Battery Storage
The battery should be stored if the machine is not
going to be used for a long period.

1. Remove:

• Battery

WARNING

When removing the battery, disconnect the
negative lead first.

Battery storage and maintenance tips:
• Recharge the battery periodically.
• Store the battery in a cool, dry place.
• Recharge the battery before reinstalling.

Refer to “BATTERY INSPECTION” in CHAPTER
2.

A.C. MAGNETO

1. Disconnect:

• A.C. magneto coupler 

2. Connect:

• Pocket tester

(to A.C. magneto coupler)

3. Measure:

• Stator coil resistance

Out of specification 

→ Replace.

Stator coil resistance:

0.22 ~ 0.26 

Ω at 20 °C (68 °F)

(White – White)

–

+

Ω×1

W W W

8-22

–

+

ELEC

LIGHTING SYSTEM

LIGHTIN

G

 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

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

{

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5

A

k

F

G

Y

X

T

S

V

U

R

O

P

Q

8

J

N

h

W

b

a

d

L

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p

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w

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\]

^

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

8-23

–

+

ELEC

LIGHTING SYSTEM

LIGHTING SYSTEM

CIRCUIT DIAGRAM

2 A.C. magneto
3 Rectifier/regulator
4 Main switch
5 Main fuse
6 Load control relay
0 Battery
B Engine stop switch
J ECU (engine control unit)
h Tail/brake light
l Multi-function meter
r High beam indicator light
s Headlight
t Headlight relay
u Headlight beam switch
y Ignition fuse
{ Signal fuse
| Headlight fuse

È PZ50VT/PZ50MP