Relays; Wire Harness Drawings - Toro ProForce 44538 Service Manual

Relays

The electrical system on all ProForce Debris Blowers in-
cludes a fuel relay that is used to energize the engine
carburetor fuel solenoid. When the ignition switch is in
the RUN or START position, the fuel relay is energized
by the Wireless Control Module.
ProForce blowers with
310000000 include a second relay. The power relay on
these machines is used to provide machine electrical
power when it is energized by the Remote Control Mod-
ule.
ProForce blower models 44538 and 44539 with serial
numbers above 312000000 include an additional three
(3) relays: a start relay and two (2) relays for energizing
the chute rotation motor. These relays are energized by
the Wireless Control Module when a remote transmitter
input is entered for engine starting or chute rotation.
The relays are secured to the control tower bracket next
to the engine. The relays can be identified by the wire
colors at the wire harness connector (see Wire Harness
Drawings in Chapter 7 -- Electrical Diagrams).
Testing
1. Make sure that ignition switch is OFF.
2. To prevent unexpected machine operation, discon-
nect the negative battery cable from the battery terminal
(see Battery Service in the Service and Repairs section
of this chapter). Position disconnected negative cable
away from the negative battery terminal.
3. Locate relay and disconnect the machine wire har-
ness connector from the relay. Remove relay from ma-
chine for easier 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 the measured value of the component you are
testing.
ProForce Debris Blower
serial numbers below
Page 4 - - 13
4. Using a multimeter (ohms setting), measure coil re-
sistance between terminals 85 and 86 (Fig. 14). Resist-
ance should be between 70 and 90 ohms.
5. 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 have continuity be-
tween terminals 30 and 87 as +12 VDC is applied to ter-
minal 85. The relay should not have continuity between
terminals 30 and 87 as +12 VDC is removed from termi-
nal 85.
6. Disconnect voltage and multimeter leads from the
relay terminals.
7. Connect multimeter (ohms setting) leads to relay ter-
minals 30 and 87A. Ground terminal 86 and apply +12
VDC to terminal 85. The relay should not have continuity
between terminals 30 and 87A as +12 VDC is applied to
terminal 85. The relay should have continuity between
terminals 30 and 87A as +12 VDC is removed from ter-
minal 85.
8. Disconnect voltage and multimeter leads from the
relay terminals.
9. Secure relay to machine and connect machine wire
harness connector to relay.
10.Connect negative battery cable to negative battery
terminal. Tighten nut that secures battery cable from 10
to 15 ft- -lb (14 to 20 N- -m). Make sure that battery cover
is secured.
Figure 14
Rev. C
86 87A 87
85 30
Electrical System