How do you change a brake light switch to a 1984 Dodge van?

To change the brake light switch on a 1984 Dodge van, first disconnect the negative battery cable to ensure safety. Locate the brake light switch, which is usually mounted above the brake pedal. Remove the electrical connector and the mounting fastener to take out the old switch. Install the new switch by reversing the process, ensuring it is properly aligned and secured, then reconnect the battery and test the brake lights.