The starter is just a DC motor so the motor gets dirty inside or the armature and brushes wear. If the battery is good and yet you just hear a click or nothing or even the starter spinning, the next most likely cause is the starter motor. They are cheap to replace yourself, though the job is a little tight. See wikianswer on 1993 Ford Escort for the process.
Behind engine underneath intake plenum. See other wikianswer on the process of replacing the starter in the 1993 escort (same as 1995).
Idle speed control or Idle air control.
Advance Auto shows different part numbers for each.
Need to raise the vehicle because the starter is on the back side of the engine under the intake plenum and can only be accessed from under the car.
Either you've got a dead cell in the battery or the cable ends need to be cleaned and tightened.
No
show 1993 ford escort ac diagram
The Escort was created on 1993-04-15.
The starter or battery could be weak. The weakness will cause the starter to turn too slowly to start the truck.
Yes, the power goes through the relay before the starter gets it so if the relay is bad, there is no power to the starter.
Yes they are interchangeable and identical.
Most commonly, it's the starter or the starter was wired wrong when it was installed. More rarely, it can also be the keyswitch or even a bad gear on the flex-plate.