Where is the powertrain control module located ON MY 1993 ford ranger xlt 4.0 4x4

I will read the SM service manual to you now.
firing order 1,3,4,2
most cars with old coil packs 4 cylinders is just one pack
not coils but yes 2 coils in 1 pack run 4 cylinders, using wasted spark tech.
oops this old dog run 8 spark plugs now that is different.
and here it is from the book
we do know 1 and 4 fire as one and 3 and 2 first as one pair too.
I sure hope the 2 coils fire, the same way.
no lag. coil 1 spark 1, to coil 2 spark 1. hummmmm
yes tricky see these sage words. from the SM

Dual Plug Inhibit (DPI) is a function of the powertrain control module that is used when the vehicle is being started. During engine cranking, the powertrain control module will only fire the spark plugs on the right-hand side of the engine.Whenthe engine has started, the powertrain control module will start normal twin-plug operation.

Keith, 1995 ford ranger, looks like interior light fuse is # 27, 10 amp. in interior fuse box panel and module #3 in under hood fuse/relay. Pg. 308 to 315 in the attached manual show fuse locations for all. Check the attached links,instruction and guides, Good luck
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Ford Ranger 1996 2007 fuse box diagram USA version Auto Genius
Diagram of 1996 ford ranger fusebox which fuse is
Ford Ranger Owner Manual
1995 ford ranger xlt interior light fuse location Google Search

located on the drivers side by the brake power booster. it will have a lot of wires on a large plug and held to the PCM with a single bolt in the centre of the plug.

Ford Series 150 1996 fuse box diagram USA version Auto Genius

It should be behind the instrument cluster.

I'll do my best to explain. The PCV is located center, upper engine area, driver side of engine, between engine block and intake manifold, mounted in vacuum hose. I hope you got that and that it helps you. Good luck.

check your heater control valve located on heater core hose

For 1993 Ford Truck Ranger 4WD 3.0L MFI 6cyl the Control Module-Ignition is located under hood, center, rear engine area, mounted on distributor.



Fig. 1: View of the remote mounted Ignition Control Module (ICM)

Hope this help (remember comment and rated this).

It does not have an ignition control module. The PCM (powertrain control module) fires the coil pack based on signal it recieves from the crankshaft position sensor and the camshaft position sensor.

ok, you may have provided that information when you wrote in but all I saw was "4wheel on ford ranger xlt won't lock in", so I had to find out what you were talking about because that could mean a number of things.
I can help you to a point but to try and describe the complete diagnostic routine is to complex for this venue.
If the light comes on when you press the 4wd high button you are getting power to the switch.
The next component to check is the Electronic Control Module that is locate to the right of the drivers side speaker. You have to remove the speaker completely to access the connectors.
The good news is that it has a self diagnostic feature built into it and will tell you if it is bad.
The module has 3 connectors, you need to disconnect the 2 flat connectors. 1 is a 5 pin and the other an 8 pin. Do not disconnect the square 8 pin that has 2 rows of 4 pins stacked over top each other.
Locate the indicator light and switch on the module, turn the ignition switch to run and flip the switch on the control module.
If the light flashes about 1 flash a second the control module is good.
If you see a steady or almost steady light the module is bad and needs to be replaced. Good luck.