Textron JACOBSEN GP400, Technical/Repair Manual

Page: 94 / 354

4-42 4252490-Rev A
ELECTRICAL
4
Engine Stop Relay (Gasoline)
See Figure 4-19.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Remove the engine stop relay. (See “Relays” on
page 4-60.)
3. Set the meter to read ohms.
4. Touch meter leads to each other and confirm a
resistance value of 0.0 ohms.
Figure 4-19
5. Measure the resistance between terminal 30 (5) and
terminal 87a (3).
Is the resistance value 0.02 ohm or less?
YES Proceed to step 6.
NO The relay is faulty; replace the relay.
6. Using a 12-volt DC power source, connect the
positive output to terminal (2) and connect the
negative output to terminal (4).
7. Measure the resistance between terminal 30 (5) and
terminal 87 (1).
Is the resistance value 0.02 ohm or less?
YES The relay is good.
NO The relay is faulty; replace the relay.
Key Switch Test
See Figure 4-20.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Remove key switch. (See “Key Switch” on
page 4-54.)
3. Set the meter to read ohms.
4. Touch meter leads to each other and confirm a
resistance value of 0.0 ohms.
Figure 4-20
5. Move key switch to the on position.
6. Measure the resistance between terminals (1 and 2).
Is the resistance value 0.02 ohm or less?
YES Proceed to step 7.
NO The key switch is faulty; replace the key
switch.
7. Move key switch to the start position and measure
the resistance between terminals (1 and 2, 1 and 3,
and 2 and 3).
Are the resistance values 0.02 ohm or less?
YES The key switch is good.
NO The key switch is faulty; replace the key
switch.
Required Tools or Equipment
Digital Multimeter or Ohmmeter
TN4005
5
2
4
1
3
Required Tools or Equipment
Digital Multimeter or Ohmmeter
TN3826
3
1
2