1997 Toyota Corolla

1997 Toyota Corolla 4 cyl Front Wheel Drive Automatic 305000 miles

I have problem in both switch doors. When I try to lock the door does not respond, I dont hear the lock. But when I hit the unlock buttom works fine, and I hear the switch lock.I take off a green relay 12v 20A part number 0 332 104 001 and the power lock work fine. But when I install a green relay, close the car and in a couple of hours the car open the doors locks by them self.I dont know what is the work of that green relay. Thanks for your help.
July 6, 2010.

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