Finally got up my courage, and pull apart my Metabo corded half inch hammer drill. It died, with no aparent reason, a couple weeks ago. I'd been using my Skil 3/8 drill, for installing deadbolts. Finally ground the gears so it doesn't work. Installing deadbolts is a bit too rough on the Skil, I guess.
Turns out the white wire broke, about an inch from the plug. That was easy. And I spent all this time worried about it. Sigh.
Lucky me, doesn't have to go spend money and buy a new drill. In 1985, I paid over $200 for this drill. One like this, somewhat, at Walmart about $75. And $26 at Harbor Freight.