50 Inch LED Light Bar Combo Beam: Wiring and Mounting Tips

By Body Armor 4x4 | Published: 2026-10-26

Category: How-to Guides

Learn how to install a 50 inch LED light bar combo beam with proper wiring and mounting techniques. Avoid common mistakes and get reliable off-road lighting.

Quick Answer

For a 50 inch LED light bar combo beam, mount it on a roof or bumper using a sturdy bracket and wire it through a relay and fuse to the battery. Always test the beam pattern and aim before finalizing the install.

Why a 50-Inch Combo Beam Makes Sense

A 50 inch light bar is a popular choice for trucks and SUVs because it provides wide coverage across the trail. The combo beam pattern blends a flood beam for close-range width with a spot beam for long-distance visibility, making it versatile for both slow crawling and high-speed desert runs.

The size and weight of a 50 inch bar mean you need a solid mounting point. Roof racks, bull bars, and bumper brackets are common options. Choose a location that keeps the bar out of your line of sight and minimizes wind noise.

Wiring Considerations for High-Power Bars

A 50 inch LED light bar typically draws more current than smaller bars, so a relay and inline fuse are essential. The included wiring harness often simplifies this, but you still need to route the wires cleanly and protect them from heat and abrasion.

If your bar uses a combo beam, the wiring is the same as a single-beam bar—there is only one set of leads. The beam pattern is fixed in the LED layout, so you don't need extra switches for different modes.

Step-by-Step Installation Guide

Choose the Mounting Location: Select a sturdy surface like a roof rack or bumper that can support the bar's weight. Ensure the bar is centered and won't obstruct airflow to the radiator or your view. Check that the mounting surface is flat and reinforced; use a bracket that matches the bar's bolt pattern.
Mount the Light Bar: Attach the brackets to the bar and then to the vehicle. Use thread locker on the bolts to prevent vibration loosening. Tighten to the manufacturer's torque spec if available. Leave a small gap between the bar and the surface to allow airflow and reduce heat buildup.
Route the Wiring Harness: Connect the harness to the light bar, then route the wires through the engine bay to the battery. Use grommets where wires pass through metal and secure with zip ties away from moving parts and exhaust heat. Avoid pinching wires in door jambs or near the hood hinge; test the harness before final routing.
Connect to the Battery with Relay and Fuse: Connect the red wire to the battery positive through the inline fuse, and the black wire to the negative terminal. If using a relay, connect the trigger wire to the switch and the relay coil to a fused power source. Always use the included fuse and relay—never wire directly without them.
Test and Aim the Beam: Turn on the light bar and check the beam pattern. Adjust the angle so the spot beam projects straight ahead and the flood beam illuminates the sides without blinding oncoming traffic. If the bar is too high, aim it slightly downward to reduce glare.

Product Spotlight

50" LED LIGHT BAR COMBO BEAM WITH WIRE HARNESS: This 50 inch LED light bar combo beam delivers 288 watts and 20,160 raw lumens with an IP67 waterproof rating. The high output and waterproofing make it suitable for harsh off-road conditions, and the included wiring harness simplifies the install.
50" LED LIGHT BAR COMBO BEAM WITH WIRE HARNESS