Start, Engine Shutdown, Seat, Pto, Alarm And Over Temperature Relays - Toro Groundsmaster
4000?D Service Manual

PRELIMINARY – For Toro Distributor and Toro Company use only.

Start, Engine Shutdown, Seat, PTO, Alarm and Over Temperature Relays

These six (6) relays are located under the console hous-
ing cover. The wiring harness is tagged to identify each
relay.
86 87A 87
Testing
1. Make sure that ignition switch is OFF.
2. Locate relay and disconnect the machine wire har-
85 30
ness connector from the relay. Remove relay from ma-
chine if necessary.
NOTE: Prior to taking small resistance readings with a
Figure 23
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 val-
ue from the measured value of the component you are
testing.
3. Using a multimeter (ohms setting), measure coil re-
sistance between terminals 85 and 86 (Fig. 23). Resist-
ance should be between 70 and 90 ohms.
4. Connect multimeter (ohms setting) leads to relay ter-
minals 30 and 87. Ground terminal 86 and apply +12
VDC to terminal 85. The relay should have continuity be-
tween terminals 30 and 87 as +12 VDC is applied to ter-
minal 85. The relay should not have continuity between
terminals 30 and 87 as +12 VDC is removed from termi-
nal 85.
5. Disconnect voltage from terminal 85 and multimeter
lead from terminal 87.
6. Connect multimeter (ohms setting) leads to relay ter-
minals 30 and 87A. Apply +12 VDC to terminal 85. The
relay should have continuity between terminals 30 and
87A as +12 VDC is applied to terminal 85. The relay
should not 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 ma-
chine wire harness connector to relay.
Groundsmaster 4000−D Page 5 − 17 Electrical System