Suzuki TU250X Service Manual page 309

9-28 ELECTRICAL SYSTEM
DIODE (For speedometer)
• Remove the headlight. (9-30)
• Remove the diode 1.
Measure the voltage between the terminals using the multi cir-
cuit tester. Refer to the following table.
C, B
A
 09900-25008: Multi circuit tester set
 Tester knob indication: Diode test ()
NOTE:
If the multi circuit tester reads 1.4 V and below when the tester
probes are not connected, replace its battery.
FUEL LEVEL INDICATOR SWITCH (THERMISTOR)
• Remove the fuel pump assembly. (5-7)
Connect 12 V battery and test bulb (12 V, 3.4 W) to the fuel level
indicator switch as shown in the right illustration. The bulb
should come on after one minutes if the switch is in good condi-
tion.
When the switch is immersed in kerosene under the above con-
dition, the bulb should go out. If the bulb remains lit, replace the
unit with a new one.

* When the bulb turns off, immediately pick up the
switch from kerosene.
* After the check has been completed, wash the switch
with gasoline.
+ Probe of tester to:
C, B
1.4 V and more
(Tester's battery voltage)
0.4 – 0.6 V
A
ON
Test
bulb
OFF
Test
bulb
Kerosene
Battery
Battery