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5 Electrical Troubleshooting
Safety Interlock System Tests
Figure 27. Test Seat Switch (Mechanical)
Figure 23. PTO Switch Testing
A. PTO Switch
4. TESTING THE SAFETY INTERLOCK
SYSTEM
A. Test PTO Interlock Switch
When a switch is replaced, test the new switch to make
sure it works correctly.
1. Turn the PTO switch (A, Figure 22) OFF.
2. Remove the PTO switch wire harness plug.
3. Set VOM to Ohms ( ). Touch one probe to each of
the back row of terminals. The VOM should show no
continuity. (Terminals closer together)
4. Touch one probe to each of the front row of termi-
nals. The VOM should show continuity (Terminals
further apart)
5. Move PTO switch to the ON position.
6. Touch one probe to each of the back row of termi-
nals. The VOM should show continuity
7. Touch one probe to each of the front row of termi-
nals. The VOM should show no continuity.
B. Test Seat Switch (Mechanical)
1. Tilt the seat forward and rest it against the steering
wheel. The switch button should should not be
depressed.
2. Tilt the seat down to operating position and have
someone sit in the seat. The weight of the operator
should depress the switch button.
Seat Switch
Button
Figure 26. PTO Switch Testing
Figure 24. PTO Switch Testing
Figure 25. PTO Switch Testing
Pull-Type Switch
Rocker-Type Switch
A
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