05 Grand Prix power locks inop

[Kilomantis]

2005 Grand Prix power locks unlock with remote, door switch, and key cylinder, but will not lock with any of the above.  I can hear the relay clicking when I try to lock the doors, and the factory security system still arms, but none of the door locks activate.  Checked fuses - ok.  Any ideas?  Please and thanks!

[moezo]

I had the same problem with my Grand-am and found that it was my relays that had gone. Replaced it and was fine after that. To test it change your relays around and see if it dose anything differant. Then you will know which relay is shot.