I have a '92 Ranger that won't start it just clicks one time. I thought it was the starter but it is good. I changed the battery terminals and that fixed one problem now it clicks until you turn the key off. I can't figure it out any advise? Thanks.

Credendovidis

What you hear clicking is the start relay. That relay should activate the main start switch in the start motor. The current draw of a start motor is too high to allow a relay to switch that. A start motor has two connections : one for direct battery power, and one to activate the build-in start switch. You have to look there ... Is that start switch activated? If not replace the start relay. If yes, check the start moter switch in the startmotor.

Success !