1. Preparation:
* Safety First: Disconnect the negative battery terminal to prevent accidental shorts or electrical shocks.
* Gather Tools: You'll likely need a socket wrench (probably a 11/16" or 7/8" socket, but check your vehicle's service manual), possibly a Phillips or flathead screwdriver, and perhaps some rags to clean up any spilled fluid.
2. Accessing the Switch:
The brake light switch is typically located on the brake pedal assembly, under the dash. Accessing it involves these steps:
* Locate the Brake Pedal: Obviously, you need to find the brake pedal itself.
* Look for the Switch: The switch is usually mounted on or near the brake pedal; it's a small cylindrical device that's actuated when you depress the brake pedal. You may see a rod or linkage connected to it.
* Clear Obstructions: You might need to move some wires, vacuum hoses, or other components to gain better visibility and access.
* Remove the Switch: Once you have visual access, use the appropriate socket wrench to remove the retaining nut or bolt that secures the brake light switch. It might be a simple twist and pull, or require some gentle maneuvering.
Important Considerations:
* Service Manual: A 1994 Chevy van service manual is highly recommended. It will give you precise location and removal instructions for your specific van model. This is crucial to avoid damaging anything.
* Vacuum Lines: Be very careful around vacuum lines if your van has them. Damaging them can lead to brake problems.
* Photography: Before disconnecting anything, take pictures. This will help you remember how everything goes back together.
* Difficult Access: In some cases, access might be extremely tight. You might need to use extensions or swivel sockets.
After Removing the Switch:
* Installation: The new switch typically installs in the reverse order of removal. Ensure the switch is properly seated and tightened securely.
* Reconnect Battery: Reconnect the negative battery terminal.
* Test the Brake Lights: Test your brake lights to ensure they're functioning correctly.
If you're unsure about any step, it's strongly recommended that you take your van to a qualified mechanic. Working on the braking system requires knowledge and care. Incorrect installation could lead to dangerous brake failure.
