Dam thing left me! Starter?

[Foosified]

forgive my ignorance... I believe the solenoid on my starter is crapped out. It's a 6month old rebuilt starter from napa. Turn the key and all I get is a ticking noise. I also here the ticking noise in the cab coming from the silver box, which is mounted to the firewall next to the steering column and above the fuse box. There is wires which connect to this box on the other side of the firewall and also into the side of it from within the cab. It gets really warm, but I am wondering if that is because the solenoid is pooched.

What's your thoughts... try a new starter?? Battery seems fine, but I'll have to verify I have 12v.