2004 Ford Explorer 04 Explorer just rapidly click when star

The clicking is coming from your starter motor solenoid. Either the battery is to low to turn over the starter motor or the starter motor has issues. Have you tried jump starting it when it clicks like this? If it starts ok with a jump then the starter is probably ok and the battery is to low on power and you have to find out if it a faulty battery or a charging problem

Thanks for a good reply. I think the battery is good, because all the lights and radios were working fine. The gauge shows battery power too. I can still try jumping it. I hope the starter motor is ok, but Ill try jumping. Thanks.

The radio, lights, etc take very little battery power compared to the starter motor so they will still work even if the battery is low. The starter has to turn the engine over and requires all the power your "good" battery has.

Thanks man,
I jumped the battery and then drove to have it checked. The battery read at 194 CCA and it should be at 300 CCA. Bad Battery. you called it. Ill need a jump in the morning to get to school probably, but Ill have a new battery soon.