Are you talking about a frame rail? If so, this is definitely NOT a DIY task. Those frame rails are heat treated, and you're not supposed to weld or apply heat to them.
Green with black stripe
Try the floor to the front left. There should be a switch you can press with your foot.
If you mean the headlight bulbs themselves; no. There is a sealed-beam and a miniture halogen option in both years and both the sealed-beam bulb numbers and the miniture halogen bulb numbers do NOT match. If you're trying to upgrade the 03, see sources and related links below for options.
take out old bulb & install new bulb . if can not do this come to repair shop . i fix that .
Too many connections.
bad ground in high beam switch
You don't. Why would you want to. You repair what is broken.
According to the 2005 Ford Expedition Owner Guide : Low beam headlamp ( # 9006 bulb ) High beam headlamp ( # 9005 bulb )
It will have a steel frame, usually 12x4 'I' beam.
England Electronic can repair most Shark Measuring Systems. They specialize in repairing or refurbishing the measuring beams, but they can also repair or refurbish the power supply, beam cable, and maybe even the probes. They have a contact form on their website. You'll find them if you search the web for Shark Measuring Beam Repair.
replace passenger side low beam headlight
most likely problem is that the low beam side of bulb or sealed beam is burned out replace with a new one