Jacobsen AR3, Technical/Repair Manual

Page: 120 / 342

ELECTRICAL
4181384 First Edition 4-63
4
Key Switch Test
See Figure 4-33.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-7.)
2. Remove the key switch from the instrument panel.
(See “Key Switch” on page 4-79.)
Figure 4-33
3. Place the key switch in the start position.
4. Connect one test lead to terminal (4).
5. Connect the other test lead to terminals (1, 2, and 3)
as directed.
Is continuity indicated at any of these terminals?
YES The switch is faulty; replace the switch.
NO Proceed to step 6.
6. Connect one test lead to terminal (4).
7. Place the key switch to the run position.
8. Connect the other test lead to terminal (3).
Is continuity indicated?
YES Proceed to step 9.
NO The switch is faulty; replace the switch.
9. Move the test lead to terminal (1).
Is continuity indicated?
YES The switch is faulty; replace the switch.
NO Proceed to step 10.
10. Move the test lead to terminal (2).
Is continuity indicated?
YES The switch is faulty; replace the switch.
NO Proceed to step 11.
11. Connect one test lead to terminal (4).
12. Place and hold the key switch in the heat position.
13. Connect the other test lead to terminal (3).
Is continuity indicated?
YES Proceed to step 14.
NO The switch is faulty; replace the switch.
14. Move the test lead to terminal (1).
Is continuity indicated?
YES The switch is faulty; replace the switch.
NO Proceed to step 15.
15. Move the test lead to terminal (2).
Is continuity indicated?
YES Proceed to step 16.
NO The switch is faulty; replace the switch.
16. Connect one test lead to terminal (4).
17. Place and hold the key switch in the start position.
18. Connect the other test lead to terminal (3).
Is continuity indicated?
YES Proceed to step 19.
NO The switch is faulty; replace the switch.
19. Move the test lead to terminal (1).
Is continuity indicated?
YES Proceed to step 20.
NO The switch is faulty; replace the switch.
20. Move the test lead to terminal (2).
Is continuity indicated?
YES The switch is good.
NO The switch is faulty; replace the switch.
Required Tools or Equipment
Digital Multimeter, Ohmmeter, or Continuity Tester
TN1097
1
2
3
4