1. Main Fuse: Some Toyota models have a main fuse or fusible link located near the battery. Removing or disconnecting this fuse will cut off power to most of the vehicle's electrical components.
2. Battery Disconnect: Disconnecting the negative terminal of the vehicle's battery will also disable the electrical system. This can be done by using a wrench to loosen the negative battery terminal clamp and physically separating it from the battery post.
3. Ignition Switch: While not a specific kill switch, turning the ignition key to the "OFF" position and removing it will stop the flow of power to many of the vehicle's electrical components.
4. Engine Control Module (ECM) Relay: In some cases, removing or disconnecting the ECM relay can disable the electrical system and prevent the engine from starting. The location of this relay can vary in different Toyota models.
It's important to note that tampering with the electrical system of a vehicle, especially for inexperienced individuals, can be dangerous and may void your warranty. If you need to disable the electrical system in your Toyota 4Runner for any reason, consult your vehicle's owner's manual or seek assistance from a qualified mechanic.