how do I know if the problem with my starter or could it be my relay switch

It could be dirty contacts on the ignition switch. It could be the neutral safety switch. It could be the solenoid mounted on the starter motor. --- To see if it's the starter or something else, next time it doesn't turn over, hook your meter to the small wire on the starter solenoid. If you see 12 volts when the key is on "Start", your starter motor is bad. If you don't see 12 volts, it's one of the other parts of the system.

for the cost of a solinoid id replace it,you may have it working hearing the click with key on start ,but the discs inside may be burnt not contacting

The question asks how to diagnose what the problem is. That's one of the steps of root cause analysis. We see questions all the time where someone has replaced a half dozen items and the problem persists. --- I've been in a position where I replaced everything because of time or distance restraints and this problem is most likely with the starter but it has not been confirmed.

If you get a clicking noise, tap on the starter with a hammer, (don't try to hit a home run). Then try to start it. If it starts the starter is shot. Not really shot, the brushes probably require replacing, if you want to take the thing apart.

Remove the starter & hook 12 volts to the starter & it should turn over. Most important is to make sure all electrical connections are tight & grounded proper.Soloinod will be the problem 95% of the time if not a bad connection.

with my starter problem>>>> i changed the starter and tested the voltage but when i put my battery connectors.. it sounds like the starter is spinning before i even put the key in the ignition....

Same problem.

Turn the key on the dash board lights up but no click nothing from the starter

I have a F-150 truck 2000 model I have replaced steering column and now my anti- theft light is flashing repeatedly how do I clear or how do I fix it if anybody has any answers or a way to fix it please contact me and let me know

I have a F-150 truck 2000 model I have replaced steering column and now my anti- theft light is flashing repeatedly how do I clear or how do I fix it if anybody has any answers or a way to fix it please contact me and let me know it will turn over but will not start

I HAVE A 2005 F150, DROVE TO A LOCATION . AFTER 4HRS OF SITTING, THE CAR WILL NOT CRANK. AN ELECTRICIAN RAN WIRE FROM STARTER TO BATTERY, IT STARTED.DROVE HOME, TRY STARTING MY CAR, IT DID WITHOUT TOUCHING BATTERY. CONTINUED INTERMITTENTLY. WHAT DO I DO

After about 30 seconds of constant flashing, the anti-theft light will flash a code. Count the number of flashes to get the corresponding code. In the steering column, you may have dislodged a wire connection to the transceiver. The transceiver is the black "antenna" ring that goes around the ignition and signals the chips inside the keys back to the car computer. Without any part of the anti-theft system working, the truck will not start. Alternatively, you can also send the computer off to delete the PATs system and bypass the troubleshooting.