Yamaha YP250 Service Manual page 250

:
YP******
4. Thermo unit
S Drain the coolant, and remove the thermo
unit from the radiator.
S Immerse the thermo unit
ant .
3
1 Thermometer
Coolant temperature
80_C
100_C
YP******
5. Voltage
S Connect the pocket tester (DC20 V) to the
temperature gauge coupler.
Tester (+) lead ! Green/Red terminal
Tester (–) lead ! Frame ground
S Turn the main switch to on.
S Check for voltage (12 V) on the temperature
gauge lead.
:
in the cool-
2
Resistance
47.5 X 56.8
26.2 X 29.3
MEETS
SPECIFICATION
1
CORRECT
COOLING SYSTEM
D Handle the thermo unit with special care.
Never subject it to strong shocks or al-
low it to be dropped. Should it be
dropped, it must be replaced.
D Do not touch the thermo unit to the bot-
tom of the heated vessel.
OUT OF SPECIFICATION
Replace the thermo unit.
OUT OF SPECIFICATION
The wiring circuit from main switch to tem-
perature gauge is faulty. Repair.
8-42
ELEC