2018 ranger diesel won’t start

Hello everyone. New to the forum and having some issues. I recently purchased a used 2018 ranger crew diesel. It ran fine when I tested it and when I got it home it worked great. My wife opened it up and pressure washed everything. Now it won’t start at all. I have tried a brand new battery, checked the starter, tested voltage at the starter. When I turn the key on I have full light, dash and the glow plugs work. When I turn the key sometimes it clicks, sometimes it does nothing. Any advice would be greatly appreciated.