Baja Designs LP9 / LP6 / LP4 Backlit Add-On Wiring Harness

The Baja Designs S8 Series Backlit Add-On Wiring Harness (MPN: 640177) is a purpose-built solution for anyone already running S8 series lights without a dedicated backlighting circuit in place. If the backlit feature is sitting unused because your current harness doesn't support it, this is the part that closes that gap.

Harness length is cut to reach the fuse panel directly or splice to keyed power — no splicing in extra wire mid-install. Baja Designs ships this complete with detailed instructions, four common fuse taps, an alternate splice connector, and zip ties. Everything needed to finish the job is included.

We like that the hardware selection here is practical. The four fuse tap options give you flexibility on your power source, and the splice connector handles installs where a fuse panel run isn't the cleanest path. This isn't a generic wiring kit — it was designed specifically for S8 series backlighting and shows in the thought put into the included components.

If you have S8 lights and aren't using the backlit function, this harness is the straightforward fix. One harness, complete hardware, clear instructions — no guesswork required.