The Baja Designs Universal XL Linkable Wiring Harness (part 640192) is an 8-plug extension harness for building out an XL Linkable light bar, with plugs that let you run up to eight XL lights. The manufacturer says its linkable harnesses come in configurations of 3 to 9 plugs, so you can set the bar to the width your vehicle needs. The XL Linkable uses individual housings joined by aluminum links, and the manufacturer's install sheet shows about 45 degrees of pitch adjustment. Owners on user forums often pick a linkable over a one-piece bar for that adjustability.
A matched harness is the better buy over a generic lead or a field splice. The manufacturer states the XL Linkable was designed and tested around its own vehicle-specific mounting solutions, and a harness built for those connectors keeps the wiring consistent with the lights and their mounts. That matters on rough trail use, where a poorly made splice is a common failure point. Buyers searching for an XL Linkable 8-light extension, a Baja Designs 640192 fitment check, or a Sport or Pro linkable harness should verify the variant first, since the manufacturer's listings separate the two.
The manufacturer lists separate 8-XL harnesses for XL Sport and XL Pro and states that the 7 to 9 light harnesses are model-specific. Confirm which variant matches your light bar with the manufacturer before ordering.
According to the manufacturer's harness description, harnesses with 3 to 8 plugs let you customize the XL Linkable to a length of up to eight lights.
Mounting the linkable bar and routing the harness are mechanical tasks that most owners handle with basic hand tools, including a 3/16-inch Allen wrench. Per the manufacturer's XL Linkable install sheet, the recommended number and location of pre-load mechanisms must be set for your specific vehicle, so check that step before tightening the links. The manufacturer's harness instructions also advise keeping all wiring away from hot, sharp, or moving components and securing loose wire with zip ties, so use the zip-tie tab on the harness during routing.
