Where is the ignition module - I need the wiring diagrams as well?

On the manuals I look at they say there is no ignition module for this car because it is integrated into the PCM. Here are the wiring diagrams so you can see for yourself (below) I have the PCM location for you if you want to try a used one. What problem are you having? Check out the diagrams (Below). Please let us know what happens.

Either relay or fuel pump can you hear pump run?

If pump runs then relay is good need to check fuel pressure when it won't start. Should be 35-45 psi

That's because it's in the pcm

Your vehicle uses the GEM (generic electronic module) and it is located behind the center of the dash.

Does not have one all is controled through PCM. What is problem?

If you have an S10 then why you asking about a Ford ranger?

No problem, just making sure you typed the correct vehicle in. For the Ford, like Doc said it does not have a separate ignition module, it uses the powertrain control module (PCM) and also has Fords generic electric module (GEM).

For the Chevy issue, is the check engine light on in the dash panel? Could be as simple as a bad mass airflow (MAF) sensor, but if you have engine light on then you should take it to local auto part store and ask them to retrieve your vehicle's check engine trouble codes. That will help pinpoint the issue. You can post the code(s) you retrieve here and I will follow up.

1336 means you need to "teach" the computer to read the crank sensor correctly. You will need a scan tool for this.

Install scan tool
vehicle in Park or Neutral
engine coolant temp. At 158 degrees F
engage parking brake
block vehicle drive wheels
turn all accessories Off
enable the crankshaft position system variation learning procedure with the scan tool
raise engine speed to 3920 RPM and release throttle as soon as the engine cuts out

The scan tool should indicate that the crankshaft position system variation has been performed

Afterwards, use the scan tool and select DTC, CLEAR INFO. Then start and warm engine to normal operating temp. Select DTC, SPECIFIC, then enter DTC P1336. Operate vehicle. Scan tool will then indicate wether the test passed.

Vehicle does not have ICM all is controled by PCM. What is problem?

Pick your liter engine:3.0L or 4.0L

1994 Ford Truck Ranger 2WD V6-182 3.0L

Component Locations

The Ignition Control Module (ICM) is located at the LH front of engine compartment, on upper radiator support.

1994 Ford Truck Ranger 2WD V6-245 4.0L

Component Locations

The Ignition Control Module (ICM) is located at the LH front corner of engine compartment, mounted on upper radiator support.