Do I need a relay for light bars? The answer is yes. You can also connect LED light bars without relays, but the premise is that it has less power. So you're only allowed to connect a light bar without a relay if you're sure the switches, fuses, and wires are sized safely.
So, do you need a relay for a light bar?
First, a relay is an electronic switch that allows a low-current circuit to control a high-current circuit. If you're using a light bar that doesn't have very large amperage power, you probably don't need a relay switch. But they are a must if you are using larger LED light bars.
Suppose you are ready to install a relay. Remember that 14 gauge wire can pull a 300 watt light bar. Switches and relay coils can be smaller in size.
So, in a sort, LED light bars can work without a relay when not correctly connected to the battery and using an amperage switch as it remains on its own separate circuit. However, if you use high beams or other lower voltage switches, you will need a relay to avoid electrical fires.
