If you’re doing an LS swap on a budget, there are ways to cut the cost and save yourself some cash. Some of us have more time than money, and building a standalone wiring harness makes sense. There are a lot of good videos on Youtube that will walk you through the process. However, at some point, you will need to add a fuse box and relays in order to power things like injectors, fuel pumps, ignition, and so on. Instead of trying to figure out what you need, BP Automotive has a kit ready to fit your needs.
BP offers two engine management fuse/relay panels. Both products will cover everything from an LT1, 5.7 Vortec, LS1, LS2, LS3, LSA, LS9, 08-14 Vortec engines, and the 99-07 4.8, 5.3, and 6.0-liter engines and like all BP Automotive products, these fuse/relay panels use OEM quality TXL wire and quality Delphi components.
The basic kit incorporates a 12-circuit fuse block with six fuses, fuel pump relay, and an ignition relay. An OBD II Diagnostic Port is also included along with a roll of engine harness tape. The standard kit includes a 12-circuit fuse block with ten fuses, fuel pump relay, two fan relays, A/C compressor relay, and ignition relay. Like the basic kit, BP also includes an OBD II diagnostic port and a roll of engine harness tape.
While these harnesses will complete a standalone project, they are not meant for someone that is not familiar with wiring. You need to have a fair amount of wiring experience under your belt to install these kits. These products come labeled and with a general guide for installation to help you along the way. BP also labels inside the covers with a legend of the location of each relay and fuse to simplify installation.
For more information on these products and complete wiring harnesses, be sure to check out BP Automotive.com.