Fuel Stop Solenoid
The fuel stop solenoid must be energized for the engine
to run. It is mounted to the injection pump on the engine
(Fig. 37).
1
2
In Place Testing
NOTE: Prior to taking small resistance readings with a
digital multimeter, short the test leads together. The me-
ter will display a small resistance value (usually 0.5
ohms or less). This resistance is due to the internal re-
sistance of the meter and test leads. Subtract this value
from the measured value of the component you are test-
ing.
1.
2.
Disconnect wire harness connector from solenoid.
Using a digital multimeter, touch one test lead to the
Figure 37
pull coil terminal and the other test lead to the fuel stop
solenoid frame (ground) (Fig. 38). The resistance of the
pull coil should be less than 1 ohm (but not zero).
1.
Injection pump
2.
Fuel stop solenoid
2
3.
Using a digital multimeter, touch one test lead to the
1
hold coil terminal and the other test lead to the fuel stop
solenoid frame (ground) (Fig. 38). The resistance of the
hold coil should be approximately 15 ohms.
4.
Connect solenoid to the wiring harness.
3
Live testing
1.
Disconnect wire harness connector from solenoid.
Figure 38
NOTE: The solenoid may be removed from the engine
or tested in place.
1.
2.
Fuel stop solenoid
Pull coil terminal
3.
Hold coil terminal
2.
If the solenoid is removed from the engine, make
sure that the solenoid plunger moves freely and is free
of dirt, debris and corrosion.
3.
Connect a positive (+) test lead from a 12 VDC
source to the pull coil and hold coil terminals.
4.
Touch a negative (–) test lead from the 12 VDC
source to the fuel stop solenoid frame (ground) (Fig. 38).
The solenoid should engage, making an audible “click,”
and the plunger should retract.
5.
Remove positive (+) voltage from the pull coil termi-
nal. The solenoid should stay engaged.
6.
Remove positive (+) voltage from the hold coil termi-
nal. The solenoid should release.
7.
Reconnect the wires to the solenoid.
Multi Pro 5700–D
Electrical System
Page 5 – 23
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