Husqvarna TC 250 2010 Workshop Manual page 392

FUEL INJECTION SYSTEM
Fuel pump test (TE - TXC)
Remove the pump as described on page S.2.
A: fuel reserve sensor
Make sure there is no fuel left in the sensor and then set the meter to the
"Impedance" scale and measure across the BLUE and WHITE wires. Correct
value is as follows: 1.3 KOhm (+/- 10%) at 20 °C.
B: pump operation
Connect the RED (+) and BLACK (-) wires to a power supply unit with constant
12V output and make sure that the pump runs.
Never keep the pump connected to the power supply unit for more
than 3 seconds in a row.
S.6
Part. N. 8000 H0368 (10-2009)