Manual truck won't start

Hey guys thanks for having me. I've searched the forum and can't find a fix:

1989 2.7L Manual transmission, all lights come on & audible click from my solenoid when I turn the key.
Where do you think the problems could be & how do I diagnose them? Thank you.

 

I assume you meant 1998, not 1989.

The likely culprit is the copper contacts in the starter solenoid.

Good news/bad news. You can get a rebuild kit from a parts store, but the starter is a bitch to remove, assuming you actually have a 2.7 and not a 22RE

 

The first thing I would do is check and clean the battery terminals. The ground cable or connection might be at fault, too.