How to use a relay as a kill switch or safety switch duration.
Kill switch relay wiring diagram.
This is the most commonly used application for disabling the starter.
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.
Every time the ignition is turned off continuity is broken on the starter feed wire.
Starter kill passive with switch relay wiring diagram.
By using a wiring diagram for your car you should be able to find which wire is your ignition cable and determine the proper one to cut into.
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.
Normally closed starter kill.
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Using your wiring diagram find the wire responsible for activating the starter solenoid and install a switch as far from the ignition as possible.
The trickiest option is an ignition kill switch.
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.
Below is an ignition kill switch wiring diagram.