Here is what I have 1 working power door lock and it's the front pass side. the rest make a ZINNNNGGGGGGGG noise when I try to use them. Any suggestions before I tear the doors apart? And if the actuators are bad anyone know if 91 town car actuators are the same? I've got 4 of those from project 55 Packard on 91 Town Car chassis. or as I call it THE LinkArd. Dave