Mine has also stopped. No lights or anything. Checked all fuses. Had the door panel off for speaker change and still couldn't get access to the keypad. Hope someone is aware of a simple fix.
It is replaceable, there is no fusible link. And since the other controls are working, it's not the #2.2 7 amp fuse in the Central Junction Box (side of dash panel). New is probably not cheap, but perhaps you could get one from a yard. The connectors are behind the speaker and there is a slide clip at the pad on the door.