I have a 1992 Ford Ranger 3.0 engine, get a click when I try to start it. Have replaced starter, starter relay and battery. Need suggestions and wiring diagram Bob

Resistance problem in the circuit. Are the battery cable ends original? If so, they may need replacement. I have seen a lot of problems caused by the original cable ends Ford uses after they become old. If cable ends have been replaced at some point and time, you can try giving them a good clean where they fit on the battery. Another quick test is to turn on the headlights and see if they come on/are bright. If not, wiggle battery cables to see if they come on/get brighter. This can indicate a cable issue

Put a draw meter on the starter lead to see how much juice it is taking to turn the engine. Sometimes bad injectors or even a leaking carburetor can flood cylinders and in effect hydro-lock the cylinders. Was the water level constant or can bad head gaskets drain into the cylinders?

Add a ground strap to the block. Could be that frame ground fails and it affects starter. The strap is not that expensive to try.

trying hitting your starter with a hammer that may be your problem your starter may need replacing

Check starter for 12 volts while trying to start, if 12 volts is present replace the starter, if not check the starter relay, starter fuse, and ignition control module.

In the meantime, turn the key to the on position and grab a screwdriver with a rubber handle. Open the hood and find your starter solenoid (located on the starter). Touch the 2 terminals on the starter solenoid together using the screwdriver. Be cautious to prevent damage to your starter or to yourself.

If starter still doesn't turn over, check and replace your battery.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

I would check the timing of the engine.
The timing may have skipped .
I would check the fuel pressure. The fuel pump could have took a dump.

Can you hear the fuel pump coming on when you turn the ignition key but do not turn it over to start.
IF you do not hear the fuel pump coming on replace it.

either a bad body ground,or your tranny is locked up,did it run good before you shut it off?

Check your battery

take back to dealer and have them check the neutral safety switch on the clutch because if the switch is not adjusted properly you will have this problem

starter or battery teat both today!

yes you need to replace the starter because most likely the seliniod is attached to the starter and you have to buy the whole thing