Here are a few important tips on how to wire your LED light bar yourself:

• First, disconnect your vehicle’s or equipment’s battery. Remove the negative/ground clamp first to avoid shorting to the vehicle’s chassis.
• Use automotive grade wire designated as GPT, GXL or TXL. GPT is the most common.
• Use the correct wire gauge. Too large a gauge wastes money but an AWG too small risks overheating the wire, which might lead to a panic-inducing fire.
• For big draw light bars, you need large gauge wires, e.g., 6 or 8 AWG. To avoid long runs of thick cable, use a relay between battery and switch. Then you can run lighter gauge to the relay and heavier wires from there to the light.
• Keep wire lengths short as possible and utilize standard wire colors: black for negative, red for positive and yellow from a relay to a switch.