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Mustang Third Brake Light Installation Guide ('05-'09)

Installation Time

15 minutes

Tools Required
  • None - all work can be done by hand.
American Muscle
Shop Parts in this Guide
  1. Open the trunk and inside pull the trim panel straight off of the underside of the trunk lid. This panel is held in place at two points one on each side. Merely pull one side away and then the other.
  2. Locate the lighting assembly and disconnect the wiring harness from the bulb socket.
  3. Remove the bulb and socket as one unit from the brake light bracket. Merely pull the unit out from the light fixture. See fig. below.

The OEM third brake light is held into place by four tabs two on each side. Press the two tabs facing outward and push in slightly. The light will become loose. Push one side up and out and then the other. The light should come out easily. See fig. below.

  1. Carefully position the LED brake light into place and gently snap it in to the trunk lid.
  2. Connect the wiring harness to the LED brake light.
  3. Test the connection to make sure the brake light is working properlybeforereattaching the trim panel.
  4. Attach the trim panel in the same manner it was removed. Insert one side in and then the other and snap the panel into place.



Installation instructions provided by AmericanMuscle customer Jason Bonaventura

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