Main, Glow And Speed Lock Relays - Toro Multi Pro 5800 Service Manual

Main, Glow and Speed Lock Relays

The main, glow and speed lock relays are attached to
the electric panel under the operator seat (Fig. 27). Re-
lays can be identified by a tag on the wire harness. The
main, glow and speed lock relays have four (4) termi-
nals.
The main relay is energized and provides electrical cur-
rent to most fuses when the ignition switch is in either the
ON or START position.
When energized, the glow relay allows electrical current
to the engine glow plugs.
The speed lock relay is used to engage the speed lock
coil when energized.
NOTE: If optional kits are installed on machine, addi-
tional relays may be present on electric panel.
Relay Testing
1. Raise operator seat to allow access to engine
compartment. Locate relay to be tested and unplug wire
harness connector from relay. Remove relay from elec-
trical panel for easier testing.
NOTE: Prior to taking small resistance readings with a
digital multi meter, 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.
1. Verify coil resistance between terminals 85 and 86
with a multimeter (ohms setting). Resistance should be
approximately 72 ohms.
2. 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.
3. Replace relay if necessary.
4. Disconnect voltage and multimeter leads from the
relay terminals when testing is completed.
5. Secure relay to electric panel and connect the wire
harness connector to the relay.
6. Lower and secure operator seat.
Electrical System
3
1. Front wire harness
2. Glow relay
Page 5 - - 20
2
4
Figure 27
3. Main relay
4. Speed lock relay
85
87
86 87
85 30
Figure 28
Multi Pro 5800
1
30
86