This universal 12-volt harness from Baja Designs is a two-light feed for its 3-pin OnX6, S8, and XL series LED lights. Instead of running a separate switch, it includes a tap-in for the vehicle's high beams, so the auxiliary lights energize with the high-beam circuit. If you want a 3-pin hi-beam tap harness for OnX6 S8 XL lights without building a custom loom, this kit is the purpose-built option. Per the manufacturer, it is rated for up to 12 amps and 150 watts per plug, so you avoid guessing at wire gauge and fusing for a two-light setup.
Compared with splicing a generic harness, a pre-built kit with matched 3-pin connections removes pin-out guesswork and reduces the chance of overloading the high-beam wiring. The manufacturer's listing states that total capacity differs between its pages (one states 150 watts overall, another 300 watts with 150 per plug), so confirm the load limit with Baja Designs before wiring a full two-light setup. Expect to do the install yourself: the kit does not come with a switch or mounting hardware, so budget for those separately.
No. The manufacturer lists no switch included, because this harness is designed to tap into your existing high-beam circuit for activation.
The manufacturer states it powers up to two 3-pin OnX6, S8, or XL lights and rates each plug at 150 watts. Its listings differ on total combined capacity, so confirm the overall limit with the manufacturer before adding a second light.
The manufacturer lists it as a universal harness rather than a vehicle-specific kit. You will need to locate a suitable high-beam wire on your vehicle and route the leads to the lights.
This is a moderate-difficulty install that suits someone comfortable with automotive wiring. Because the kit includes splice connectors but no switch or mounting hardware, you will need to identify the high-beam wire, make your connections, and secure the relay and harness yourself. The manufacturer's install sheets for related Baja Designs harnesses call for disconnecting the battery ground first, using a 10mm or 1/2-inch socket for the battery terminals, and mounting the relay on an existing bolt about 1.5 feet from the battery. No install sheet specific to part 640163 was confirmed in our research, so check the manufacturer's documentation for this kit before starting. Use a multimeter or test light to confirm the high-beam wire before powering the lights, and route the harness away from hot, sharp, or moving parts.
