Start, Engine Shutdown, Seat, PTO, Alarm, Down Latching, and
Over Temperature Relays
These seven relays are located under the console hous-
ing cover. The wiring harness is tagged to identify each
relay.
Testing
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 val-
ue from from the measured value of the component you
are testing.
86
85
87A
87
1.
Disconnect the harness connector from the relay
that is to be tested.
2.
Using a multimeter (ohms setting), measure coil re-
sistance between terminals 85 and 86 (Fig. 26). Resist-
ance should be between 70 and 90 ohms.
30
3.
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 make and break
continuity between terminals 30 and 87 as +12 VDC is
applied and removed from terminal 85.
Figure 26
4.
Disconnect voltage from terminal 85 and multimeter
lead from terminal 87.
5.
Connect multimeter (ohms setting) leads to relay ter-
minals 30 and 87A. Apply +12 VDC to terminal 85. The
relay should make and break continuity between termi-
nals 30 and 87A as +12 VDC is applied and removed
from terminal 85.
6.
Disconnect voltage and multimeter leads from the
relay terminals. Reconnect relay to machine wire har-
ness.
Groundsmaster 4100−D
Page 5 − 17
Electrical System
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