How to install a kill switch in the Honda BeatUpdated September 4, 2023
This guide will walk you through the process of installing a kill switch that disables your fuel pump. There are quite a few ways to set up a kill switches, but I like the fuel pump cut-off because, as long as the would-be criminal doesn’t find the switch, there’s no way to steal the car short of towing it. Cutting fuel (instead of the battery) means the car will also power on and crank, so it’s not immediately obvious that a security measure is at play. The thief may assume your 90s Honda is just a piece of junk and move on.
- 25A switch
- 10mm socket/wrench
- 16 AWG wire
- Butt connectors
- Crimping tool
- Heat shrink tubing
- Heat gun (or hair dryer)
- JIS 2 screwdriver
To rig our kill switch, we’ll need access to the Beat’s main relay. Luckily, I’ve already written a guide for accessing the relay. Once you’ve worked through that tutorial, I’ll see you back here at Step 1.
We’re removing the main relay so we can we can determine which wire to cut to install our kill switch. I had to do this because there weren’t any resources available on the internet. In theory, all Beats should be wired in the same way and you can skip testing and jump straight to Step 3. However, there’s always a chance my Beat isn’t exactly the same as your Beat. Please test so you don’t break your car.
After gaining access to your main relay, we need to unplug it so we can access the pins on the harness.
The main relay is secured by a single 10mm fastener:
Once the fastener is removed, push in this clip and carefully wiggle the plug while pulling straight back:
If you’re having trouble removing the plug, you can try to gently separate the parts with plastic pry tools.