caution - Toro

Start, Engine Shutdown, Seat, Alarm, PTO, PTO Overtemp, Down Latching and Over
Temperature Relays
These eight (8) relays are located under the console
housing cover (Fig. 30). The wiring harness is tagged to
identify each relay.
1
Testing
1. Make sure that ignition switch is OFF.
2. Locate relay and disconnect the machine wire harness
connector from the relay. Remove relay from machine
if necessary.
NOTE: Prior to taking small resistance readings with a
digital multimeter, short the meter test leads together.
The meter will display a small resistance value (usually
0.5 ohms or less). This resistance is due to the internal
resistance of the meter and test leads. Subtract this value
from the measured value of the component you are
testing.
2
Figure 30
1. Control panel 2. Relay location
2
3. Using a multimeter (ohms setting), measure coil resistance
between terminals 85 and 86 (Fig. 31). Resistance
should be between 70 and 90 ohms.
4. Connect multimeter (ohms setting) leads to relay terminals
30 and 87. Ground terminal 86 and apply +12
VDC to terminal 85. The relay should have continuity between
terminals 30 and 87 as +12 VDC is applied to terminal
85. The relay should not have continuity between
terminals 30 and 87 as +12 VDC is removed from terminal
85.
86
85
87A 87
30
Electrical
System
5. Disconnect voltage and multimeter leads from the
relay terminals.
Figure 31
6. Connect multimeter (ohms setting) leads to relay terminals
30 and 87A. Ground terminal 86 and apply +12
VDC to terminal 85. The relay should not have continuity
between terminals 30 and 87A as +12 VDC is applied to
terminal 85. The relay should have continuity between
terminals 30 and 87A as +12 VDC is removed from terminal
85.
7. Disconnect voltage and multimeter leads from the
relay terminals.
8. Secure relay to machine if removed. Connect machine
wire harness connector to relay.
Groundsmaster 4100--D Page 5 - 21 Electrical System