first thing: you search for it.
that would have told you that you open the hood, take out the three screws (two on either edge, and one in the center, rear lower than the assembly itself) (This is for each assembly)
remove all three bulbs from the assembly with a 1/4 turn and pull.
replace.. and adjust your lighting aim.
Now.. since you DIDN'T search, should I type all that out for ya?
Ray