The Baja Designs 640129 is a universal UTV wiring harness that pairs an on/off rocker-style switch with a three-pin lead for the brand's OnX6+, S8, and XL light bars. The manufacturer says the harness is built for lights with a rocker style switch and UTV-length runs, so you don't have to hunt for a compatible switch, cut and splice a loom, or guess at pin wiring. Its toggle-style design is meant to offer a manual On/Off switch, relay protection, and clean plug-and-play wiring, which is a safer route than tapping a factory accessory circuit by hand. Choose it over a generic bargain switch kit when you want a light bar setup that's built around Baja Designs connectors and the OnX6/S8 lead layout.
Fitment centers on the manufacturer's application listing of OnX6 (10"-20") / S8 (10"-30") bars, and the harness is listed as universal. Before you commit, owners on user forums stress checking your lights' combined amp draw against the maximum amperage of the aux channel you plan to use. If the draw is too high, they keep the harness's relay and skip the rocker switch. For DIY work, the manufacturer's install sheet for the related 64-0119 OnX6/XL harness calls for disconnecting the battery ground first and mounting the relay about 1.5 feet from the battery. Search terms this part matches include 10 inch and 30 inch UTV light bar wiring harness, OnX6 S8 rocker switch kit, and Baja Designs UTV light bar on/off harness.
The manufacturer lists a rocker-style On/Off switch as included. Mounting hardware is not included, so plan on securing the switch in your own dash panel.
The manufacturer lists it for OnX6 (10"-20") and S8 (10"-30") light bars, and describes it as designed for its three-pin OnX6+, S8, and XL series lights.
The manufacturer's installation manual hub does not list a sheet for this part number. For installation help, contact the manufacturer directly.
This is a moderate DIY job that involves cab work, not just plugging in. The manufacturer's install sheet for the related 64-0119 OnX6/XL harness lists a 10mm or ½" socket for the battery terminals and ½" and ¾" drill bits for the switch holes. Start by parking, turning the vehicle off, and disconnecting the battery ground. Mount the relay on an existing bolt roughly 1.5 feet from the battery. Before removing the switch terminals, photograph their orientation so you can reconnect them correctly. Route the switch leads through the firewall, then tie up all wiring away from hot, sharp, or moving parts.
