Toro Groundmaster Series Service Manual page 236

Testing Relays with 4 Terminals (continued)
Electrical System: Testing the Electrical Components
6. Connect the multimeter (ohms setting) leads to relay terminals 30 and 87.
The ground terminal 85 and apply +12 VDC to terminal 86. The relay should
make and break continuity between the terminals 30 and 87 as +12 VDC is
applied and removed from terminal 86.
7. Verify infinite resistance (no continuity) exists between terminals 30 and 87.
8. Connect the multimeter (ohms setting) leads to relay terminals 30 and 87.
Ground terminal 86 and apply +12 VDC to terminal 85. The relay should
make and break continuity between terminals 30 and 87 as +12 VDC is
applied and removed from terminal 85.
9. Replace the relay if necessary.
10. If the relay testing is correct and a circuit problem still exists, check the main
wire harness; refer to
11. Connect the wire harness electrical connectors to the relay after you
complete the testing.
12. Connect the wire harness, install any items removed to access the relay, and
connect the battery ground cable.
Appendix A (page A–1).
Page 6–44 Groundsmaster ® 3200, 3300 and 3310
19240SL Rev A