ELECTRICAL
4203780 First Edition 4-85
4
Diodes Test
See Figure 4-55.
1. Park the mower safely.
2. Remove diode. (See “Diodes” on page 4-109.)
Figure 4-55
3. Set the digital multimeter to the diode check setting.
4. Connect the test leads to terminals (1 and 2) and
record the reading.
5. Reverse the test leads and record the reading.
Does the meter read approximately 0.5 volts in
one direction, and an open circuit when the leads
are reversed?
YES The diode is good.
NO The diode is faulty; replace the diode.
Fuel Pump Test
See Figure 4-56.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Allow engine to cool completely.
Figure 4-56
NOTE
Label all wires before disconnecting to ensure correct
installation.
3. Disconnect harness connector (1).
4. Using a jumper wire, connect the battery positive
terminal to fuel pump connector (2).
Does the fuel pump operate?
YES The fuel pump is good.
NO The fuel pump is faulty; replace the fuel
pump.
Required Tools or Equipment
Digital Multimeter
TN2024
1
2
Required Tools or Equipment
Jumper wire
1
TN2019
1
2
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