Toro ProLine H800 Service Manual page 234

Testing the Oil Pressure Switch (continued)
Electrical System: Testing the Electrical Components
1. Park the machine on a level surface, lower the cutting deck, set the key
switch to the OFF position and remove the key from the key switch.
2. Locate the engine oil pressure switch on the engine and disconnect the
wire harness connector from the switch. Check the switch and the harness
connector for damage or corrosion and clean or repair as necessary.
3. Connect a multimeter (ohms setting) to check the continuity of the switch:
A. With the engine off, the oil pressure switch should be closed so there
should be continuity between the switch terminal and the metal switch
body.
B. With the engine running, the oil pressure switch should be open so there
should not be continuity between the switch terminal and the metal switch
body.
4. Replace the switch if testing determines that the switch is damaged.
5. If the switch tests correctly and a circuit problem still exists, check the
machine wire harness; refer to
6. After testing, connect the engine wire harness to the switch before returning
the machine to service.
Appendix A (page
Page 6–34
A–1).
ProLine H800
19241SL Rev A