Toro Groundsmaster 4500-D Series Service Manual page 328

Testing
Electrical System: Component Testing
g276024
1. Coil terminal
2. Common terminal
1. Park machine on a level surface, lower cutting decks, stop engine, engage
parking brake and remove key from the ignition switch.
2. To make sure that machine operation does not occur unexpectedly,
disconnect negative (−) cable from battery and then disconnect positive (+)
cable from battery (see
3. Locate relay that is to be tested.
4. Disconnect wire harness connector from relay. Remove relay from mounting
bracket for testing.
5. Using a multimeter, verify that coil resistance between terminals 85 and 86 is
from 71 to 88 ohms.
6. Connect 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.
7. Disconnect voltage from terminal 85 and multimeter lead from terminal 87.
8. Connect multimeter (ohms setting) leads to relay terminals 30 and 87A. Apply
+12 VDC to terminal 85. The relay should make and break continuity between
terminals 30 and 87A as +12 VDC is applied and removed from terminal 85.
9. After testing, disconnect voltage and multimeter test leads from the relay
terminals. Secure relay to mounting bracket and connect wire harness
connector to relay.
10. Secure all removed components to machine.
11. Connect positive (+) cable first to battery and then connect negative (−) cable
to battery (see Battery Service (page
1
86
85
1
Figure 207
3. Normally closed terminal
4. Normally open terminal
Battery Service (page
6–71)).
Page 6–46
3
4
87A 87
30
6–71)).
Groundsmaster ®
19245SL Rev A
4500-D/4700-D