wont crank
 

i have a 2000 oldsmobile silhouette. I just changed the water pump this morning. i let it run approx. 20 minutes to see if it was going to get hot and check for leaks. after 20 minutes the engine shut off. Checked the guages. Temperature guage was normal. I am assuming this is something new. anyone have ideas. checked the battery, it is fully charged. headlights work ok.when it shut off the only light on was the traction control light. After turning the key to start nothing happens, no click, no guage lights. after releasing the key in the message screen it is showing the battery. I need help

it turned out to be a ground below the thermastat that had corroded. it blew the ignition fuse in the fuse box.