Allstar Performance ALL76253 Brake Light SwitchPlunger (OE) Style

This is a brake light switch. When a lot of people hear that there's a brake light switch they assume it's just a simple on/off switch for your brakes that activates by your brake pedal pressing on this button, and it kind of does, but... You can see there are four terminals in here. That's a bit more complicated than just an on/off switch, so let's take a look inside. Alright, we got this apart. This is the first step of taking it apart, but we still have to remove the blue plastic casing, but this button we can take apart now. It's just a hollow tube with a spring; the spring just pushes it back out so it doesn't get stuck in the on position. Beneath this plastic shroud is a capacitor and a resistor. On the side of the switch with the smaller connectors, this button slides in and out of here. There are metal contacts in there and this just slides in to complete the circuit. So these t