General; Relays - Toro Z Master Z400 Series Service Manual

ELECTRICAL

General

Note: Interactive Electrical Troubleshooting CD,
Form 492-9143 is also available.

Relays

Purpose
There are 2 relays:
1. Start Relay
2. Kill Relay
1. Start Relay: Functions as an electronic switch. Once
the safety connections are met, the relay will activate
completing the circuit to the starter solenoid.
2. Kill Relay: Functions like an electronic switch. If
all conditions for operation are not met, the relay
closes, grounding the engine ignition system.
Location
The relays are located under the panel assembly (Fig.
380).
6
A
A - Start relay
6-2
B
Fig 380 PICT-0189
B - Kill relay
How It Works
A relay is an electrically actuated switch.
1. Coil: Terminals 85 and 86 are connected to a coil.
Applying 12 volts to these terminals energizes the
coil turning it into an electromagnet.
2. Switch: Terminals 30, 87 and 87a are actually part of
a single pole, double throw (SPDT) switch. Terminal
30 is the common lead. The switch is spring loaded
so that 30 and 87a are connected when the coil is
not energized, the switch is "thrown" and 30 and 87
are connected (Fig. 381).
Fig 381
Z Master Z400 Service Manual
DSC-2517