Accessory Fuse Block and Cable Install in a 4WD - YouTube Click to view11:28How to add a secondary fuse block to your vehicle to power accessories. I install a fuse block in my Land Rover Defender to power additional accessories and lights. I explain what you will needAuthor: Roaming The OutbackViews: 120K 12v fuse box | eBay Related: 12v fuse box 6 way 12v fuse box 12 way 12v fuse box 4 way 12v switch panel 12v fuse box campervan 12v fuse holder 12v circuit breaker 12v fuse box 10 way Refine more Format How-To Wire Lights & Switches in a DIY - EXPLORIST Hopefully, you now know how to wire 12v lights and switches into your DIY Camper. If you have any questions, leave them in the comments below and subscribe for future updates. Now that you know how to wire in a 12v switch and all of your lighting, it’s time for a lesson on how to figure out what size and type of wire to use in your DIY camper van electrical system.