Yamaha SR125 1997 Service Manual page 231

3. Voltage
S Connect the pocket tester (DC20V) to the
fuel gauge coupler.
Tester (+) lead !
Brown terminal
Tester (–) lead !
Sky blue terminal
S Turn the main switch to on position.
S Select the gear position in neutral.
S Check for voltage (12V) of the "Sky blue"
lead on the neutral switch.
This circuit is not faulty.
SR******
5. If the carburetor heater fails to operate.
1. Thermo switch
S Disconnect the thermo switch connector
from the wireharness.
S Connect the pocket tester (Ω
thermo switch lead.
Tester (+) lead ! Black terminal
Tester (–) lead ! Black terminal
S Check the Terminal 1 and 3 for continuity.
A
COOL DOWN
B
HEAT UP
:
1
2
MEETS
SPECIFICATION
1) to the
1
2
MEETS
SPECIFICATION
:
SIGNAL SYSTEM
OUT OF SPECIFICATION
Check the connection of the entire signal sys-
tem.
Refer to "CIRCUIT DIAGRAM".
OUT OF SPECIFICATION
Replace the thermo switch.
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ELEC