Stopped starting

[mrgm]

1979 C20
Silverado
454 TH400
Stock

I'm sure someone has had this problem.
Washed engine bay at local do it yourself wash, with the wand. Went to start and turned on wipers at the same time. Just fast clicking sound...but was not like a starter sound. All accessories still operational..ie lights, ac fan, etc. motor did not run over, starter did not make a noise. I let sit for a little, tried again, nothing..no more clicking sound. So I had it towed home. I checked the basis stuff, fuses, battery connections, starter connections. So I just assumed starter. Pulled mine off went to parts store and had it tested. Was fine. Grabbed another since I pulled the original out. Replaced. Same thing. So them assumed ignition switch. Replaced, same thing.

Still nothing when I trying to crank. Starter does not engage.

So I come here to look for a possible problems, troubleshooting advice and solutions

Edit: battery is about a year old and strong