When seat belts fail, they fail in the locked position. It is easy to replace, finding the new, working seat belt is probably hardest part
Fully retracted or fully extended, the mechanism must be broken. Replace it with a new or good used one.
Inside of the drivers side fender well.
You can not disable it. You can disarm it by unlocking the drivers door with the key.
under the hood on the drivers side towards the firewall.
On the inner fender on the drivers side. Will have two connectors (one large) .
Convertible 2094 lbs Hardtop 2127 lbs According to the 1988 Drivers Manual
all OBDII connectors are located drivers side beneath the dash
In the trunk , drivers side on fender well behind the carpet
They are most likely garage door openers ( Home link )
The main fuse box can be found in the engine compartment. The fuse box will be near the firewall on the drivers side.
Sure it is possible to fail it.
Attatched to the frame rail under the car on the drivers side.. mid way tween the drivers door and the wheel arch on a convertible or under the rear passenger door on a sedan