Toro 3550-D Lawn Mower User Manual


 
Reelmaster 3550−DPage 5 − 40Electrical System
NOTE: Prior to taking small resistance readings
with a digital multimeter, short the meter test leads to-
gether. The meter will display a small resistance val-
ue (usually 0.5 ohms or less). This resistance is due
to the internal resistance of the meter and test leads.
Subtract this value from from the measured value of
the component you are testing.
D. Using a multimeter, verify that coil resistance be-
tween terminals 86 and 85 is approximately 72
ohms.
E. Connect multimeter (ohms setting) leads to relay
terminals 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.
F. Disconnect voltage and test leads from the relay
terminals.
5. After testing is completed, secure relay to mounting
bracket and connect wire harness connector to relay.
Install cover to control panel.
6. Connect positive (+) cable to battery and then con-
nect negative (−) cable to battery (see Battery Service
in this chapter).