How to use a relay as a kill switch or safety switch duration.
Kill switch relay wiring diagram.
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The basic starter kill relay diagram shown below breaks continuity of the wire from the ignition switch to the starter motor or in some cases i e.
It does not rely on an alarm or keyless entry for it to work only a simple momentary contact switch normally open to deactivate it.
Normally closed starter kill.
Ford to another relay when the alarm is armed and the ignition is turned on.
Using your wiring diagram find the wire responsible for activating the starter solenoid and install a switch as far from the ignition as possible.
Every time the ignition is turned off continuity is broken on the starter feed wire.
This is the most commonly used application for disabling the starter.
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Once the wire is cut you can either solder the 2 ends of the wire into the switch or use additional connectors and crimp it on no soldering required.
Below is an ignition kill switch wiring diagram.
Starter kill passive with switch relay wiring diagram.