Power Door Locks

The power door locks on my 2001 Saturn L200 lock and unlock very intermittently whether or not the key is in the ignition or the remote is nearby. I have tried replacing the relays but the problem continues. The only way it stops is if I remove a specific relay and break the circuit. I don't have the ability to check the computer at home. I have not checked for any shorts. I wouldn't know where to start. Any suggestions? Thanks