Thank you all for your advice. I managed to get some good info to get as far as removing the whole door panel. This I've already done. The window is sitting on the bottom of the track and I can see the cable hooked up but only to pull down. There seems to be a symmetrical hook-up which would probably anchor to another cable for pulling up. But I dont see the up-pulling cable and the anchor hook-up to that, looks a little bent.
Does anyone have a diagram of the cable installation or can tell me where to go from here?
Thanks, Ray