If you are referring to the accessory drive belt located on the front of the engine the general procedure is to relieve tension on the belt by first finding the belt tensioner, then using the appropriate tool to push it in towards the (usually) center of the engine and then taking the belt off best way you can. It isn't really hard to do this. Reinstallation is a little harder. Follow the diagram which will be located somewhere under the hood, and you can't go wrong. Of course you will also have to push the tensioner aside to put the new belt on.
( Yes ) the 1999 Ford Explorer has a serpentine belt It is used to " drive " the accessories Power steering pump , alternator , etcetera
Your Explorer has a serpentine belt tensioner which keeps the proper tension on the serpentine belt unless the tensioner has failed.
The explorer has a timing chain, not a belt.
The Ford Explorer engines use a timing CHAIN
That's the accessory drive belt at the front of the engine for your power steering , air conditioning compressor , alternator etc.
A loose belt on the motor.
I believe the Explorer does NOT use a timing belt, but rather a timing chain
The 1999 Ford Explorer has a cam chain not a belt. No maintenance is required.
On one of the stickers in the engine compartment , ahead of the radiator , there should be a serpentine belt routing diagram
The 2001 Ford Explorer Sport V-6 has a timing belt. Ford engines have not use a timing chain since the 1980s.
The belt turning the alternator which is recharging the battery.
near the belt
My 1995 Ford Explorer has a diagram in the front of the engine compartment showing how the serpentine belt is routed . Does your Ford Aerostar not have that .
The 4.0 liter V6 engine in a 1994 Ford Explorer has a timing CHAIN
The 4.0 liter SOHC , V6 engine in a 2002 Ford Explorer has ( 3 ) timing CHAINS
It has a timing chain.
The first thing to check is your fan-belt tension, if it's loose it will slip and not drive the alternator efficiently. Adjust/tighten it as required
Wear your seat belt.
Timing chains, no belt.
I am afraid that is impossible, since an Explorer doesn't have a timing belt. It uses an internal timing chain, which you don't service, unless it breaks or is rattling. Are you talking about the accessory drive(fan) belt? If so, there is a spring loaded tensioner that you use a socket wrech to pivot out of the way and remove tension from the belt and change the belt.
Timing CHAIN on the 4.0 liter V6 in a 1993 Ford Explorer
The security module on 2002 Ford Explorer is on the passenger side, second row behind the seat belt panel.
No , the 1996 Ford Explorer ( 4.0 liter V6 engine and the 5.0 liter V8 engine ) has a timing CHAIN