It does not have an orifice tube just a compressor and accumulator
Inside the fuel tank.
the computer box on a 1992 topaz is on the drivers side under the dashboard on the firewall behind the fuse panel to the left i would think a 1993 would be similar
Inside the oil pan, mounted on the engine block.
The starter solenoid is on the left side fenderwell next to the battery.
need diagram of rear brake lines for 1993 mercury topaz
The oil pan on a 1993 Mercury Topaz is typically located underneath the engine towards the rear. You will need to lift the vehicle and access it from underneath to perform any maintenance or to change the oil.
There is not an expansion valve on a 1993 Surburban. There is an orfice tube (white) in the high side line of the evaporator.
If you fallow the rad hose off the top of rad there will be a body that the hose is clamped on to at the motor it will be under there
passdenger side inner fender next to coolant overflow bottle
On the valve cover
Photos might be available online through forums, websites, or repair guides that detail the steps for installing a water pump on a 1993 Mercury Topaz. You can search for "1993 Mercury Topaz water pump installation guide" or "1993 Mercury Topaz water pump replacement" to find detailed instructions and possibly photos to help with the process.
It is made into the liquid line, you have to replace the line to service.