2003 F150 5.4 XLT Audible click in engine compartment close to relay but doesn't turn over. Brand new relay. Checked wiring. Connections are tight. No frayed wires. Lights aren't dimming at all.

Could be a relay or the ignition/ignition relay burnt starter cable bad ground to battery or starter solenoid check them in that order use a test light on the starter on the small wire have someone try to turn it over when they turn the key the tester should light up if not its your ignition wire if so its your starter

(If so meaning if it lights up and doesnt turn the starter over its your starter and try jumping the starter with a screwdriver the small cable bolt to the red wire ot should turn over and always make sure your battery in.the truck is well charged 12v at least)

I replaced the relay having never noticed it click when started it regularly. Still nothing so I'm going after the starter. I'll post more if that's not the problem. Thanks in advance.

It was the starter. The wire between the solenoid and the starter was crazy corroded and drawing really high amperage. I've never had one just stop working. Usually they'll make some funky sounds letting me know it's about to go out. Thanks for the help!