Jul 16, 2020 · The 2006 Ford F-150 truck is going to use a different light bulb size for the third brake light than it does for the normal ones. The third brake light is going to need to use a 921 bulb. These bulbs are a very common size so they shouldn't be too difficult to find. A single bulb is going to range in price from between $10 to $20 but I would suggest going with one of the more expensive ones ...
Mar 20, 2009 · I believe the third light is a board of leds or small bulbs hence it is non serviceable but replaceable. 2006 Black and Chrome Limited Hemi w/Saddle browns, AEM CAI, Magnaflow, Silverstars, RR lift, Bilstein shocks and struts, Mickey Thompson Baja MTZ- 265/70/17 on Rev Wheel 822's, DBA cross drilled and slotted rotors, Hawk HPS brake pads ...