A Relay consists of an electromagnet and a
switch operated by the electromagnet within a
single package.
When 12v is supplied to the two small
terminals on the left of the relay, it causes the
switch to close and supply 80v to the mower.
When 12v is absent, the switch will
automatically open. This causes the mower to
shut off.
While it is standard practice to add a diode
across the electromagnet to suppress spikes,
the diode is internal to the relay on these
models and should require no maintenance.
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Relay Overview
Confidential and Proprietary - Property of Techtronic Power Equipment - DO NOT COPY or DISCLOSE
Relay
Electromagnet
or “coil”
Switch
12V
+
-
80V
Diode
When you turn the mower
on/off, you should hear an
audible “click” when the
relay engages/disengages.
If USB and headlights work,
the relay is good
If the relay “chatters”, check
all connections and bolts
are tight.
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