Hisun HS700UTV-4 Maintenance Handbook page 340

5. If the coolant temperature warning light does not come on when the main switch to "ON", or if the
coolant temperature warning light does not come on when the temperature is high (more than 117
~ 123 °C (242.6 ~ 253.4 °F):
(1). Bulb and bulb socket
• Check the bulb and bulb socket for continuity.
(2). Thermo switch 1
• Remove the thermo switch 1 from the cylinder
head.
• Connect the pocket tester (Ω × 1) to the thermo
switch 1 ①.
• Immerse the thermo switch 1 in coolant ②.
• Check the thermo switch 1 for continuity.
While heating the coolant use a thermometer
③ to record the temperatures.
The thermo switch 1 circuit is open and the
□
A
coolant temperature warning light is off.
The thermo switch 1 circuit is closed and the
□
B
coolant temperature warning light is on.
Test
Coolant temperature
step
Less than 120 ± 3 °C
1
(248 ± 5.4 °F)
More than 120 ± 3 °C
2
(248 ± 5.4 °F)
More than 113 °C
3
(235.4 °F)
Less than 113 °C
4
(235.4 °F)
ELECTRICAL COMPONENTS
CONTINUITY
Continuity
No
Yes
Yes
No
- 327 -
NO CONTINUITY
Replace the bulb and/or bulb socket.