2002 ford f150 extended cab 4×4
Alternator tested good and replaced
the battery? Starter also tested good!
When u turn the truck over it just
makes a clicking sound. Checked
fuses and grounds what can I do
did you install the batter and not start it and it sat overnight. check connections at the battery, and wherever those wires go, make sure they are tight. give the state a love tap. not with a hammer, a piece of wood won't actually damage the housing.
Check your battery cables and ends. Corrosion can get inside and ruin them and you might not see it. Replacement ends that are clamped onto the old wire are notorious for not having a good connection.