Toro Multi Pro 1200 Service Manual page 81

Start, Neutral Engine Speed Lock, Spray Pump Clutch, Boom Actuator and Spray Valve
Relays
The start, neutral engine speed lock, spray pump clutch
and boom actuator relays are used on both the Multi Pro
1200 and Multi Pro 1250. The Multi Pro 1250 uses an
additional three (3) relays for the spray valve system. All
of the relays are located under the operator seat (Fig. 9).
The relays are all identical and can be identified by a tag
at the relay wire harness connector.
Testing
1. Park machine on a level surface, stop engine, en-
gage parking brake and remove key from ignition
switch.
2. Raise operator seat and locate the relay to be tested.
Disconnect wire harness connector from relay and re-
move relay from panel.
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. Using a multimeter (ohms setting), measure coil re-
sistance between terminals 85 and 86 (Fig. 10). 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 terminals 30 and 87
should have continuity as +12 VDC is applied to terminal
85. The relay terminals 30 and 87 should not have conti-
nuity as +12 VDC is removed from terminal 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. With terminal 86 grounded, apply
+12 VDC to terminal 85. The relay terminals 30 and 87A
should not have continuity as +12 VDC is applied to ter-
minal 85. The relay terminals 30 and 87A should have
continuity as +12 VDC is removed from terminal 85.
7. When testing is completed, disconnect voltage and
multimeter leads from the relay terminals. Replace relay
if necessary.
8. Secure relay to machine panel and connect wire har-
ness to relay. Lower operator seat.
Multi Pro 1200/1250
1. Operator seat (raised)
1. Coil terminal
2. Common terminal
Page 5 - - 9
2
1
Figure 9
2. Relay location
3
1 4
86 87A 87
85 30
2
1
Figure 10
3. Normally closed term.
4. Normally open term.
Electrical System