I struggled to find this information online so as i was wiring up my campervan i decided to put a video together of how i wired it up and what methods and parts i used. The fuse box is located on the door side of the kitchen and along the pantry cabinets. This link will show fuse and relay for if not right year you can google the year make and model with fuse box diagram and get other links some recent work on the aliner 12 popupportalbuick century engine wiring best site wiring diagram.
