FUEL SYSTEM AND GOVERNOR
45
5. With the ignition key in the “on” position, test for volt-
age at the power lead connection. See Figure 4.21.
• If battery voltage is present, bench test the sole-
noid.
• If the voltage at the connection is not the same as
the battery voltage or there is no voltage, the prob
-
lem is with the equipment’s electrical system and
not the solenoid. Follow the troubleshoot proce
-
dures found in the appropriate service manual for
that piece of equipment.
Bench testing the solenoid
To bench test the solenoid:
1. Remove the afterfire solenoid by following the proce-
dures described in the afterfire solenoid section of
this chapter.
2. Connect the ground lead of the solenoid to the nega-
tive side of a 12 volt power supply
NOTE: A battery charger set to the trickle charge (2 amp)
setting works fine for this test.
3. Connect the power lead of the solenoid to the posi-
tive side of the power source while watching the sole-
noid’s plunger.
• If the plunger does not retract, the solenoid is
faulty and must be replaced.
• If the plunger does retract, there is most likely an
increased resistance type of failure in the equip
-
ment’s electrical system. Perform voltage drop
tests to find the source of the resistance.
Figure 4.21
Afterfire solenoid lead from main harness
Ground lead
Figure 4.22
Extended
Retracted
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