94 f-150 radio problems

my dad has a 94 f-150 and a while ago the horn and radio stopped working (just asked and he doesnt know if they happened at the same time). He took it to a mechanic and he said the horn problem was something in the steering column, blah blah

so i pulled out the radio and tested the switched power today, it was getting like 11.7v on accesory (car not on)

he says occasionally one of the back speakers makes a pop when he presses and holds the power button, but nothing ever really turns on.

does it sound like the radio is bad? sounds like it to me since the power is there, just wanted to get some opinions before i switch it out

thanks

so i put in a new radio and found out the constant power wire in the harness didnt have any of said power.

so im just using the cigarette lighter wire