85 200sx keyless, alarm

Two questions guys; 1985 Nissan 200sx, Viper 5900 First; I have no idea what my factory keyless code is. It's the kind with the key-pad on the door. I contacted Nissan north america. I'm still waiting on a reply. Don't think I'm gonna get one. Any ideas? Second: The Viper 1041 power lock thing. Now before you professional installers get mad at me. My car is way torn apart and it's my toy. These two past weeks; Power doors, windows, mirrors(factory), digi-dash, voice warn, and the 5900. Basically se to sgl. I already converted it to a turbo using factory stuff. And I'm going 13B-T soon. So understand and actually be glad it's not in your shop. How do I wire the 5900 locks. Also(third question, sorry); What's the size for the factory diodes in my car(sgl). I think they're all the same size. 1amp? And other common sizes. Hook me up with a Digi-key num so I can order a bunch.

Found 1041. Didn't try the locks yet though.