Glow Relay - Toro Groundsmaster 7200 Service Manual

Glow Relay

The glow relay used on the Groundsmaster 7200 and
7210 allows electrical current to the engine glow plugs
when energized. The glow relay is attached to the frame
in the engine compartment.
The glow relay is energized by the glow controller when
the ignition switch is initially turned to ON/PREHEAT
and also when the ignition switch is turned to START.
Testing
1. Raise and support hood.
2. Make sure ignition switch is in the OFF position. Dis-
connect wire harness electrical connector from glow
relay.
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.
3. Verify coil resistance between terminals 85 and 86
with a multimeter (ohms setting). Resistance should be
approximately 72 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 make and break
continuity between terminals 30 and 87 as +12 VDC is
applied and removed from terminal 85.
5. Disconnect voltage and leads from the relay termi-
nals.
6. Connect wire harness electrical connector to glow
relay after testing is completed.
7. Close and secure hood.
Groundsmaster 7200/7210
1. Glow relay
86
85
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2
1
Figure 28
2. Engine
30
85
87
87
30
Figure 29
Electrical System
86