I looked at the inside of the door panel and there were three wires coming off the lock switch itself. I was assuming like you that one was negative and the other two were lock and unlock but what I was really lookiing for was where the , I think five wires went to from the lock actuator. I dont know which is negative and where the other four would go.
Also can someone tell me how to check and see if the lock actuator is any good? I would hate to spend all this time on this and find out that the actuator is bad.