Service Manual

ELECTRICAL
7-1TimeCutter® Z/Precision® Z Service Manual
7
Electrical System
How It Works
Relay (Kill Relay)
Purpose
The relay used in the TimeCutter Z is used to connect
or disconnect the engine electronic ignition and starter
solenoid from chassis ground.
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. Ter-
minal 30 is the common lead. The switch is spring
load ed so that 30 and 87a are connected when the
coil is not energized. When the coil is energized, the
switch is “thrown” and 30 and 87 are connected (Fig.
432).
Two things happen when turning the ignition switch to
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switch to the starter solenoid coil terminal. (2) At the
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terminal of the interlock relay (kill relay). The interlock
relay (kill relay) activates and takes the engine electronic
ignition ground wire off ground to allow the engine to
spark and grounds the starter solenoid to engage the
starter motor of the engine.
Location
The relay is located in front of the engine (Fig. 431).
Fig. 431 PICT-9734
Fig. 432 MVC-671X