I'm not familiar with your 2004, but I drive "89, and '93 F-150s.
My headlight bulbs are inserted into a lamp-holder that mounts into the back of the headlamp assemblies via a 1/4 turn locking "tab" method.
To remove the lamp-holder I just turn it one quarter turn counterclockwise, and pull it toward the rear of the vehicle. It is not even necessary to remove the wiring harness/connector from the lampholder.
The 2006 F150 owners manual shows H13 / 9008 headlamp bulb
9004
The 2001 Ford F-150 owners manual shows bulb # 9007 for the headlights
How to change light blub in console on a Ford F150.
According to the 2001 Ford F-150 Owner Guide : Each headlight has ( 1) # 9007 bulb
Check out the enclosed instruction book.
Your owners manual will detail where the fuse block(s) are and which fuses are for what. If it ends up being a bulb, see sources and related links below for bulb information.
Inside bumper back of it
The headlight adjustment for the 1989 F150 2WD is below the actual headlight. You will need to pull the tab at the top of the headlight up to release the headlight and then you can adjust the angle of the light with the long bolt below the housing.
2009 Ford F-150 headlight bulb lamp replacement procedure: Purchase the correct replacement headlight bulb(s) first, before disassembling the vehicle. See Sources and Related Links below for replacement bulb information and full light bulb part numbers list. Then consult your owner's manual for the headlight bulb lamp replacement procedure. As simple as it sounds, the owner's manual is the best place to start for bulb replacement instructions and illustrations. You may want to consider replacing both left and right at the same time in order to keep brightness and color equal (optional).
I'm not positive, but most Ford trucks now have a bulb that can be replaced by opening the hood and coming to it from behind the light. The bulb receptacle usually twists one way or the other to loosen
Pop the hood and look at the top of the headlight, there should be 2 bent pieces of metal behind the headlight that look like hooks. Pull them up and the headlight should come all the way out. The only thing keeping it attached now is the wires to the actual bulb holder. This only works on the f150. The f250 and up were still the older style looking truck.