Hi,
Truck won’t start. All lights and radio work, but it won’t turn over. It has taken a charge previously, but now just a clicking sound from the box (electrical?) on the passenger side.
Sounds like the battery is very low. The clicking is probably the starter relay. Has the truck been sitting? A lot of that going on right now. See if it will start with a jump and have the battery and alternator tested. If it’s going to be sitting, a trickle charger is a good investment.
And just how old is that battery?
Do you live in an area with sustained high temperatures . . . such as the southwest?
Batteries usually only last 4 - 5 years here
Take something like a baseball bat and give the starter a couple of good whacks.
If the starter works, replace the starter.
Tester
Geeh, I usually suggest only a rubber mallet 
Why not just hit it with your purse?
Tester
A decent baseball bat costs twice as much as a starter. I’d use something less costly for that.
Crow bar, baseball bat, hammer. or a weight!
Tester