If the truck is manual. There are a couple of place to check. A bad ignition switch, bad clutch interlock switch or a bad starter relay.
If it is an automatic. The selector switch could be bad.
Could be,Battery failure, Loose or corroded battery connections, Starter relay failure, Starter failure, Starter solenoid failure, Neutral safety switch broken or out of adjustment,
Could be,Battery failure, Loose or corroded battery connections, Starter relay failure, Starter failure, Starter solenoid failure, Neutral safety switch broken or out of adjustment,
Could be -battery dead -ignition switch broken -safety switches not working -solenoid switch not working -brushes bad in starter -gear warn out on starter -starter motor dirty -starter no good -belts to tight on deck any of the above.
If the starter isn't working, the car will not crank at all. When you turn the key you will either get a clicking sound (which could also mean a dead battery), or you will hear the sound of an electric motor spinning and nothing else.
I've had a sticky starter solenoid do this to me. I just hit it with a hammer and it's been working since. But you could replace it too.
Could be the battery is drained or bad. Could be battery connections at battery and or starter are dirty and or loose. Could be starter solenoid is bad. Could be starter is bad.
That means the solenoid IS working, but power is too low to turn the starter. Check and if necessary clean or tighten the battery terminals. If still the same, charge your battery on slow for at least 12 hours, or get another battery.
Since the dentist was working on my teeth, I could only mumble my reply to his questions.
That is not anywhere near enough information to make a determination about the status of the starter. Could be the starter, but could be the starter solenoid, wiring problems or even the ignition switch.
FIRST CHECK THE BATTERY IF GOOD]> THEN STARTER MOST LIKELY IS BAD ?
Can be a dead battery, defective starter, loose or corroded battery connection, or blown main fuse. If nothing comes on when you turn on the ignition switch and your interior lights are not working it is not the starter.
could be a starter relay switch check it. it may be mounted on he fire wall or finder well