The Baja Designs 640172 is a dedicated wiring kit for LP9 Pro and LP6 Pro off-road lights. The manufacturer describes it as wiring harness with plug and play Deutsch style connectors and a built-in splitter to power two LP9 lights. Compared with improvising a circuit from a bare relay and a generic switch, this kit ships with its protection already sized: a 20A/40A relay & 30 amp inline fuse. Its three-position switch, rated for 30 amps, lets you run high and low beams independently, and a separate amber lead can tie into your daytime running light circuit. Owners on user forums who built their own harnesses have had to replace undersized relays after blown fuses, so the included, matched components are a real reliability advantage. Search terms this kit answers include LP9 Pro 2-light harness, LP9 Pro on-off-on switch wiring, Baja LP9 Deutsch connector harness, and LP6 Pro high low beam harness.
The harness is listed as universal rather than vehicle-specific, so fitment depends on your mounting location and switching method, not your model. The manufacturer specifies a 12 foot length for battery to instrument cluster and 15 foot length for instrument cluster to light mounting location, which gives you room to route power to a bumper, roof, or A-pillar. Mounting hardware is not included, so plan on your own brackets. Owners on user forums report that the bundled switch and wire bundle can be too thick to feed through the firewall into the cab, and some drivers on vehicles with factory auxiliary switches cut the harness after the lamp leads and use the vehicle's own relays and fuses instead. Use caution when wiring high and low beams to separate switches: owners who discussed this on forums recommend a lockout arrangement so both circuits cannot be energized at once.
Yes. The manufacturer lists the LP9 Pro and LP6 Pro as the compatible lights for this harness, so the same 640172 kit serves either light.
Yes. The manufacturer includes a three-position On-Off-On switch that operates the high beam and low beam functions independently, and the kit also carries an extra amber lead for the daytime running light.
Owners on user forums report doing this on vehicles with factory aux switches. They typically cut the harness at the light leads and rely on the vehicle's own relays and fuses. Forum users also warn that high and low circuits should never be energized together, so confirm your switching setup before cutting anything, and check with the manufacturer about the appropriate wiring method for your application.
No. The manufacturer's specification lists mounting hardware as not included, so you will need brackets suited to your light mounting location.
The manufacturer provides a printed installation sheet for the LP-Series Pro harness, which is worth reviewing before you start routing wire. The Deutsch connectors plug directly into the LP9 and LP6 Pro lights, so the lamp-side work is quick; most of the labor is routing the 12-foot battery run and the 15-foot cluster run to your mounting point and terminating the power, ground, and switch connections. Expect to need a crimping tool, a drill for the switch and any grommets, and fuse-tap or ring-terminal hardware for the battery and ground connections. Owners on user forums suggest running the bundled wire through the firewall grommet or a dedicated pass-through, since the bundle can be bulky. Also, a Baja representative posting on a user forum recommended 12-gauge wiring for the LP9 lights, so verify the wire gauge against the manufacturer's install sheet before you commit to a layout.
