Yamaha XVS6501997 Service Manual page 315

:
6. Thermo switch
S Remove the thermo switch from the thermo
switch plate.
S Connect the pocket tester to the thermo
switch lead.
Tester (+) lead !
Brown/Yellow terminal
Tester (–) lead !
Black/Yellow terminal
S Immerse the thermo switch in the water
S Check the thermo switch for continuity. Note
the temperatures while heating the water
with the temperature gauge
Test step Water temperature
1 Less than 23
2 More than 23
3 More than 12
4 Less than 12
Test 1 & 2: Heat-up test
Test 3 & 4: Cool-down test
f: Continuity
S If condition is not good, replace the thermo
switch.
7. Carburetor heater
S Remove the carburetor heater from the car-
buretor body.
S Connect the pocket tester to the carburetor
heater.
Tester (+) lead ! Heater terminal
Tester (–) lead ! Heater body
CARBURETOR HEATER SYSTEM
1
2
.
3
.
4
Good
condition
f
3_C
3_C
4_C
f
4_C
: No continuity
CORRECT
1
2
OFF
ON
Thermoswitch
12 4_C
INCORRECT
Replace thermo switch.
7-47
ELEC
Thermoswitch
23 3_C
E