2003 ford expedition want start

Hello,

My name is Mike.. I will be your Mechanic Doctor today. If when you turn the key and it just clicks, it is going to be a issue with a connection to your solenoid/starter.

I will explain more. Because your lights are working and all that, then it does not appear to be a battery issue. The way it works, is when you turn the key, it would go through a relay and then trigger your starter solenoid, which then triggers your starter to turn over motor.

99% of the time when you hear a click it is the cables going down to your Starter/solenoid Or bad solenoid itself. But before we panic on that, first do this.

Trace all your cables that go to your starter, and it is possible that the connections are loose or corroded. Take a socket of open end wrench and undo cables make sure they are clean and no corrosion and then after you are convinced it is clean, then tighten back down real snug, and do this with all your battery cables as well. And the ground from battery to the frame area. I am pretty sure if you check all your black and red main cables and especially ones going to the starter ( which is where the click is coming from) then you will find out that will solve the problem. Sometimes also, after you are convinced you have cleaned all and there tight, if it does still click, then get a 1by2 and use a hammer and tap directly on the solenoid and starter. Sometimes that will trigger it to work, if not then starter/solenoid will have to be replaced. Let me know how it goes, Mike ( Dr fixya man)

Check battery cable ends on battery, clean, and tighten if needed.
could be low battery due to lose, or coroded cable ends.
it could even be starter,and relay, but start with the simplest and work your way up till you find it (testing the circut) if it is the cable ends, then you will save a lot of money.
I hope this helps you!