No start

[bigbird73fj40]

73 has been running good. Today at gym turned key with and nothing. Jump box in truck just in case started up with a Noco boost.
Got home and tested battery which is good at 13v. Charged battery just in case I had bad reading but went back out hours later and same thing. Nothing, no click, nothing.
Interesting is when I hook up noco it keeps clicking and I have to hit override button which starts vehicle.
Thoughts? Starter, started solenoid? I know everyone will say grounds so check all that out. Distributor is good, ignition switch is new
Thanks

 

[brian]

Load test the battery.
Battery voltage can be fine, but amps output not.

 

[charliemeyer007]

The contacts in the solenoid on the starter can get really pitted up. If you are game they can be cleaned up with a file. Ignition switch can be bad or the connection at the starter is corroded.

+1 for load test the battery. Also check the crimp connectors on the cables - corrosion can crawl under the insulation ruining the wire.
I just bought new 2/0 cables - cranks much better now.

Crappy battery tenders tend to fry batteries if left on long term. I like to leave them on overnight once or twice a week.