Spotlight is an easy one. As you look at the rectangular spot/fog cluster the outer ring has 4 evenly spaced holes (the other 4 are for the angle adjustment of the lamps). Undo these with a suitable allen key and the units drop out of the bumper. Pop the rubber cover off and use a test meter to check their is power getting to the lamp. If there is it's pretty sure the bulb has died so just pop a new one in and reassemble the unit as Mr Haynes would say "Refitting is the reverse of removal"