Seat Switch, Relay and Time Delay Capacitor
The seat switch is a normally open (N.O.) switch that
closes when the operator is on the seat. With no opera-
tor on the seat, there is an open circuit to the time delay
capacitor and relay coil. If the PTO switch or traction
switch is open and the operator raises off the seat, the
engine will stop after a delay of 1 to 2 seconds.
Seat Switch Test
1. Raise the seat to get access to the seat switch wiring
co
nnector.
2. Disconnect the seat switch wiring connector and
install a continuity tester or ohm meter between the two
leads of the seat switch.
3. Lower the seat. The continuity tester should show no
c
ontinuity.
2
1
Figure 6
1. Seat switch
2. Time delay capacitor
3. Seat switch relay
NOTE: Make sure the compression spring and pin holds
the seat up off the seat switch when there is no operator
on the seat.
4. Have the operator sit on the seat, slowly depressing
t
he seat switch. The continuity tester should show con-
tinuity as the seat approaches the bottom of its travel.
Relay Test
To test the relay, disconnect the relay wire connector
and install a continuity tester between the relay termi-
nals (terminals 30 and 87). The relay should make and
break continuity at terminals 30 and 87 as 12 V.D.C. is
connected and disconnected to terminal 85 with termi-
Figure 7
nal 86 connected to ground.
Relay
Electrical System
Groundsmaster
®
455-D Page 5 - 17 Testing
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