I have the same problem with a 97 Grand Cherokee. The interior lights and power door locks will randomly switch off and on. I ended up puling the relays for the locks and lights so the battery wouldn't die. It seemed to be triggered more frequently when the vehicle rocked side to side as when cornering or going over bumps. Coincidently this started a few days after fixing the rear hatch release (taking the panel off and lubing the moving parts). I'm looking for a wiriing diagram to find common links.
The the keyless remote sounds like a possibility. I can reproduce the problem easy enough to test this.