Start with taking off the crome rim surrounding the light assembly. You'll need the star type head screwdriver and a Phillips head. Then remove two top screws and two bottom screws of headlamp assembly being careful not to touch the alignment srews. THis drops down the light. Pull out the old bulb straight back. Replace and reassemble.
On a 1996 Ford Aerostar : The fuse box is under the instrument panel , on the drivers side
Under the van by the left/front tire attached to the inner frame.
How to replace a headlight on a toyota hiace van
According to one of Fords websites : The spark plug gap for the 3.0 V6 in a 1993 Ford Aerostar is : ( .044 inch )
There are several possibilities; headlight switch, headlight breaker or fuse, connectors, dimmer switch.
What exactly do you want to know about "Air conditioning clutch on a 94 ford aerostar van?" How to replace? What engine do you have, etc.?
Electric or manual?
On a 1996 Ford Aerostar : I believe if you open the drivers door , on the latch pillar , you will see an information sticker that shows the original size of tires on the vehicle from the factory
What type of rear end do you have?
from inside, in footwell undo plate, headlight behind
On the Ford A4LD automatic transmission the modulator valve is on the passenger side of the transmission ( it might be behind a heat shield )
where is location of thermostat in ford aerostar van, 1993