It is called a Cabin Filter and not an A/C filter. It may not have one. This information is listed in your owners manual. Don't have one, then go to an Advance Auto Parts store and ask for a Purolator Cabin Filter for your 1999 Ford. If it has one then they will have it listed. The filter comes with complete instructions for installation.
An 08 F150 Harley Edition does have a cabin air filter located on it. Furthermore, the F180 Harley Edition has a fuel filter located in the engine compartment.
I don't think 1999 F150 had a cabin air filter option. I have never seen an F150 with a cabin air filter, and all the guys around here I have asked have never seen one either.
I had a 99 F150 4wd with a 4.6L engine. The filter was located in front of the driver's side front tire, attached to the frame rail.
What year? 2001
16
Its located near your air filter box
forward of the firewall
It is located under cab on drivers side on inside of rail.
Where is the gas filter located on a 1995 F150XL pickup with duel gas tanks?
6 quarts ( 5.7 liters ) WITH FILTER CHANGE
6 quarts with filter change
Usually it's located near or under the air filter.