Originally Posted by Cal Learner

Bad battery. Has just enough juice left to light the dome light briefly without any other electrical consumers on, but the moment the key is turned, there's not enough to even light up the gauge lights, never mind to spin the starter. Power door locks work because they are vacuum-operated, not electrical. Take the battery to get it tested to confirm. While you're replacing the battery, take a moment to clean up the connectors on the battery cables and the ground connection. If the battery is relatively new, you'll have the additional problem of troubleshooting the reason for it being drained. But if it's at least 5 years old, it's run out of life. Welcome to the forum.

Originally Posted by throne7

To add to that, check out the alternator too. You will be glad you did.