Hy bigwolf, If I'm remembering correctly, there should be a ten gauge wire either molded into the battery positive cable or mechanically attached to it, this wire may be a fusible link or not. That ten gauge wire goes to a junction connection mounted to the radiator support, from there wire/s go into the cab and provide power for everything in the cab, Do you have such a wire, is there any power at the junction connection post? Hope that helps.
