Hi we have a ford f250 7.3 diesel, and won't start, we have a click when we turn the key, we change batterys, and nothing, then we change the solenoid and nothing, then we change the starter and start, we when for a short drive and get home turn it off, and try to turn it on again and did't star again, we took the stater apart and put ti back and we have the same problem again just click, but won't start, anybody know the reason, we are shot in cash now, and we have no transportation, we need help to know what it is wrong with our truck.

battery is dead, or lugs rusty
if head lamps fail even not using the key
then the battery is dead.
jump start it if stranded or call autoclub for a boost.
held lamp , bright even key in hand not used.
they work at any time even key lost ,by laws. USA)

If the battery terminals and cables are clean and tight , it points to a starter motor fault.

hi there.
this youtube video might help you out.
NISSAN MICAR k12 WON START OR TURN OVER RANDOM PROBLEMS WITH IGNITION
or this google link.
Nissan micra k12 won start Google Search

The battery may be charged but if cables are loose or corroded power won't flow. Take off battery terminals, clean and retighten

I looked at info for your security system, it is starter motor disable. I didn't see 06 ford Taurus in my database, so I looked at 05.
Battery has a full charge and battery connections all good?
We can usually do some tests to see if starter motor will crank the engine, but, if the security is the problem, it still won't start.
You can check for applicable trouble codes? Try a different key?

Ford products are sensitive to changes in Battery voltage. The system views low Voltage as an attempted theft and makes the Alarm go off.

Remove the Battery, return it with a full charge or new Battery. Some other symptoms would be slow cranking or clicking like a dead battery. The Antitheft reduces starter Voltage to around 7 Volts making starting nearly impossible.

Please rate my info. If all else fails, the Identity in the car memory may no longer match the identity on the car keys. You would need to have a Dealer rematch the keys to the car.

Sounds like a bad starter relay or starter or the connection at either of these locations could be bad.

start by checking the starter relay.it should make a click when you turn the key.if not the relay may be bad. if it does click you may have to change the starter.the tarnsmission range sensor will also cause this problem.

Okay, If this noise happens when you turn the Key to start, your Starter Relay is bad. Now the other possibility is the Glowplug Timer. When you start a Diesel there is a pause in the initial cold start. You turn the Igniition Key to Run, then let the Glowplug Timer cycle. This cycle sound will be a series of clicks which also may cause the lights to dim.

The glowplugs absolutely must warm up to start a cold diesel engine. There should be a light on the dash which either goes off when the glowplugs are ready or a light will turn on when they are ready. It is only after that activity that you will turn the Key to Start.

Since Diesels take more power to Start, there are 2 batteries. As with a single battery system, every connection must be clean. If the Glow-plug Timer is working and you only get clicks by turning your Key to Start, check the things I said earlier. Your Starter Relay and the big cable connections.

If after all of that, the engine will not turn over and only clicks, jump the Starter Relay with 1 cable from a jumper cable set from the Positive Battery cable post to the Starter Relay on the Starter wire connector. Make sure the truck is in Park or Neutral. If the Starter jumper cable sparks and the Starter does not turn, the Starter is bad. If the Starter spins it confirms the Relay is bad.

I hope my Solution gets you going and that you consider this helpful.

check battery first if ok check starter