Hello Jackie Ashley, I would make sure you are getting the trigger signal to the starter as a first test. You can check for voltage at the small terminal on the starter when you have a helper turn to start. You can also try to jump the starter,from the large terminal that has the battery connection on the starter to the small terminal that has the trigger wire on the starter,the engine should then crank if the battery is good and the positive and ground connections are ok. Here is a picture of where to jump.Just make sure the truck is in park,with the brake set when trying this.
Ashley,Since you are hearing a click, It is probably the under hood relay you are hearing.You will have to check for power coming in to it on the red wire ,and then out on the purple wire, when the key is turned to start. You will see by the diagram I am sending that there is also a signal from the engine computer that is used to control the staritng circuit. The testing asks that a scan tool be used that can determine if you are getting a crank request form the ignition switch. I believe with the diagram and testing info you should be able to find the problem with out that.Try to determine if the relay is working by following the tests and using the diagram. problem, trying to send the last part of the info,problem with the system,I hope what I sent is good enough for you to find the problem.