How to replace the third brake light bulb on 2005 ford five hundred

SOURCE: 2006 Ford Five Hundred -- Where's the fuel filter?

right rear just in front of wheel. push clips back and remove old filter. apply new filter insuring flow is correct direction by arrow on filter press the clips back in place and you are ready. check to see if it is leaking.

SOURCE: 2005 Toyota Sienna rear brake light problem.

have you checked the earthing continuity-if it's this other bulbs may also partly light when brakes used
otherwise-
Check continuity of live from center to lh & rh lights and/or is there a live at those lights

SOURCE: Rear lights stopped working on my Ford Five Hundred

my 05 has 3 nuts that hold the taillight assembly onto the car. in the trunk, pull the matting back, my be some snaps holding or cargo hooks. unscrew or pull, then take the 3 nuts off and entire tail light assembly should come off. Then twist out the correct but connector.

SOURCE: 1997-Ford Explorer how to replace the third brake

there should be some screws to remove and the unit will come out, then you can deterrmine the correct bulb.

SOURCE: how do i replace bulb on third brake light on a

I found this step by step guide for you. It's for an 02 but should be the same for your 05.

Third Brake Light Replacement Guide