Yamaha YW50AP Service Manual page 199

2. Voltage
8 Connect the pocket tester (DC20V) to the
fuel gauge coupler.
Tester (+) lead→Brown terminal 1
Tester (-) lead→Frame ground
8 Turn the main switch to "ON".
8 Check for voltage (12V) of the "Brown"
lead on the fuel sender lead.
3. Fuel gauge
8 Connect the fuel sender to wireharness.
8 Move the float to "UP" 1 or "DOWN" 2.
8 Turn the main switch to "ON".
8 Check the fuel gauge needle moves "F"
or "E".
Float position
Float "UP" 1
Float "DOWN"2
This circuit is not faulty.
MEETS
SPECIFICATION
Needle moves
"F"
"E"
MOVES
7-41
SIGNAL SYSTEM
OUT OF SPECIFICATION
Check the connection of the entire signal sys-
tem .
Refer to "CHECKING OF CONNECTIONS".
Refer to "CIRCUIT DIAGRAM".
NOTE:
Before reading the meter, stay put the float
for more than three minutes respectively at
"UP" or "DOWN".
DOES NOT MOVE
Replace the fuel gauge.
– +
ELEC
F
1
E
Br Dg
L Gy B
G Ch