Need help with Iginition switch/starter issues

It would be helpful to know what year/ model, whether it's stick/ auto, or if stick, if it has the "clutch safety" switch.

Generally, One of the small push--on connections should be hot with the key in crank. You can easily test this with a light. If not, the several places to check are:

Bad connection in the bulkhead connector, bad connection at the ignition switch, bad ignition switch, or a broken wire in between

Now, to make the relay work, you have three options:

If there two small push on connectors, you either have an auto, or a clutch safety switch. Now that you have determined which wire is hot "in crank," this second push-on connector should be grounded when the auto is in park or neutral, or when the clutch is pushed in.

To test, hook a clip lead from this second relay terminal to ground and see if it cranks. If so, you have a bad neutral safety switch, or the wiring to it, ditto if clutch

If you only have ONE small push on, you have an earlier stick with no clutch safety switch. This relay should click if you jumper the battery connector to this small push on terminal on the relay

If you can hear the relay click and it won't crank, it's either the relay or a starter problem, or related wiring. If jumpering across the main batt. connector to the other exposed screw connection causes the starter to operate, then its in the relay or wiring previously mentioned.