For 1990-2009 cars

1. Remove the left side lower I/P closeout panel (hush panel) push pin fasteners and remove the panel.
2. Remove the left side lower heater duct assembly push pin fastener and remove the duct.
3. Remove the stop lamp switch by rotating it 180 degrees so it will pull out from the bracket.

Important: The notch on the plunger will be fully visible when the plunger is all the way out.

4. Pull the switch plunger all the way out, which may require moderate force.
5. Install the stop lamp switch into the bracket and rotate 180 degrees while holding the brake pedal down during installation.
6. Adjust the stop lamp switch by pulling the brake pedal all the way up by hand. The switch internal ratchet mechanism will lock the switch in the adjusted position.
7. Install the left side lower heater duct and push pin fastener.
8. Install the left side lower I/P closeout panel (hush panel) and push pin fasteners.