Power windows in any year and pretty much any vehicle all work the same way
Motor is DC and has 2 wires, which means motor will spin clockwise if it has 12v and ground, then if you reverse it to ground and 12v motor spins counter-clockwise, window up and window down
That's what the door switches do, control the polarity, +/-, on the two wires at each motor
BOTH motor wires are grounded(-) at each motor all the time by the switch for that motor
When you press the switch, ONE WIRE is ungrounded and then connected to 12v, motor now has 12v and ground(other wire) so it spins
Push switch the other way and Polarity is reversed and motor spins the other way
easy peasy, window up and window down
Master switch, this seems more complicated than it is
The drivers door switch is as described above
Passenger door switch on Drivers door has 2 wires that run to passenger door switch
These 2 wires are the GROUNDS for the passenger door switch
When you press the button on drivers door switch it does as described above, one wire is ungrounded and connected to 12v, so passenger door motor spins
For the passenger door switch to work on its own it needs its own 12v wire from same fuse as driver side gets it 12v
So passenger side switch has grounds from drivers side switch and is own 12v wire
So it can operate the same as described above
There is ONLY one ground wire in the whole system, for drivers door switch, it is behind the kick panel on that side
There is only 1 fuse, in 1994 its a Circuit Breaker, #14 30amp in cab fuse box
No, a 9v battery wouldn't spin the motor, no AMPs
You need a volt meter, set to DC Volts
Unplug the motor's 2 wire connector
Key ON
Hook up light or volt meter to the 2 wire connector that goes to the switch
Press the switch
Should see +12v OR -12v
Then press switch other way, and it should reverse + and -
If so and motor doesn't work then motor is bad
If no +/-12v then most likely the circuit breaker is bad, unplug it and test with OHM meter, should see 0 ohms by touching both terminals with the two meter probes, one probe on each terminal of the fuse/circuit breaker
All power window motors have a thermal limiter inside, this is what stops the motor turning when the window gets to the top or bottom of its track
When window stops moving motor heats up instantly and the thermal limiter OPENS, cutting power inside the motor, it quickly resets, but......................................not always, lol, and motor will no longer work, and not a serviceable part
Auto UP or Auto Down, this circuit was added in later years, its a separate module, 1994 doesn't have it
Just FYI
In a 4 door its the same setup, just 2 wires from driver's door master to each door/window, and one 12v wire to each door/window, so 6 wires out from master, and 4 wires from fuse/relay one to each door
1 ground wire, behind driver side kick panel