There are three springs inside. If the bottom plate isn't installed tight, the latch won't spring back. I ran into this with my Dart. The Challenger console lock and the Dart glove box lock take the same part. If the plate isn't tight, the pin gets pushed past its stop and jams.
I ended up buying a new lock from Tony's Parts. They are $40. The new lock did the same thing after a couple pushes of the button. I found that the bottom plate wasn't attached tightly to the main lock body. I made a slight modification to hold the plate tight and it's been fine since. That reminds me...I should take that lock with me to the Nats. Maybe Tony will replace it.
