How to install switches in a car




















Do not pull on any of the wires, as this can cause damage. How can you determine which one you need to splice into when installing your kill switch? Start by connecting the black probe from the multimeter to a bare metal surface this will ground it. Then, turn the tool on and set it to 20 DCV. The live wire should test around 12 volts. This will be the wire that is triggering the relay and is the one you should splice into.

This will prevent blown fuses and help keep you safe while you work. To splice the wire , simply use wire cutters to cut it across the middle. From there, use wire strippers to carefully strip both ends. This will prepare the wires for the installation and connection of your kill switch. Still, it should be accessible enough for you to turn it on and off each time you use your car.

At this point, you should have two wires coming from your kill switch and two wires the ones you created when you spliced coming from the kill switch relay assembly.

Depending on where you installed your kill switch, you may need to run some gauge wire from the kill switch to the relay assembly. As you do this, consider using a wire loom to house the wires safely and protect them from damage. From there, you can use spade connectors to connect the wires so that the kill switch is spliced into your relay assembly.

This will protect it from being stolen, giving you some added peace of mind. Then you can take your negative battery wire and slide it on to the battery disconnect switch and screw it on. These battery disconnect switches will come in a turning knob, lever or some even have a key that needs to be used in order to turn the switch on and off. The downside to this kill switch is that it requires you opening your hood each time to get to your battery switch.

A remote controlled battery disconnect switch is one of the most convenient ways to quickly disable your car on a regular basis. No need to go under your hood to turn a knob or remove your battery cables to prevent your car from starting.

This device uses a latching relay, so it only uses power when it is switching it on or off, no power used to hold it in either position which would cause battery drain. Inline fuse bypass switch is another way of disabling your car. A common way to prevent theft is by pulling out a fuse that will stop your car from being started, like your ignition fuse or your fuel pump fuse.

Depending on where your fuse box is located in your car, you might not want to have to manually pull out a fuse each time you get out of your car. Have you ever thought about getting a dash cam? Checkout our Best Dash Cams of List. This option will allow you to put in a fuse bypass switch in an easy to reach area for you to switch on and off. One downside to this setup is that wire that will go into the fuse box may stick out a bit, preventing you from putting your fuse box lid on all the way.

Toggle switch: 12V 25A Toggle Switch. This type of setup uses a physical switch or toggle button hidden somewhere in your car, usually under the dashboard area or around your car seat so it is easy for you to access it when you get in and out of your car. The way this works is by adding a switch to the wire that comes off your cars ignition switch where you turn the key. 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.



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