No Crank...No Start...No Parts Required! (Nissan Armada)

This 2005 Nissan Armada refuses to crank over after the engine bay was power-washed. Sure sounds like a low battery condition, but a JUMP START DOES NOT HELP! Which tool comes out first to troubleshoot a no-crank? The trusty DVOM! Really neat example of voltage drop testing, and NPR repairs :) ASTRO AI AMP CLAMP: https://www.amazon.com/dp/B08MTCMWLB?... Enjoy! Ivan