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.
Kill switch relay wiring diagram.
The trickiest option is an ignition kill switch.
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.
How to use a relay as a kill switch or safety switch duration.
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.
This is a stand alone starter kill.
Every time the ignition is turned off continuity is broken on the starter feed wire.
How to wire relay starter kill switch get the book at amazon.
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.
Below is an ignition kill switch wiring diagram.
High capacity off grid solar generator rev 4 wiring diagram parts list design worksheet duration.