When installing some led light bars ,sometimes it needs the wiring hardness that usually includes a relay
If your LED light bar came with a wiring harness that includes a relay, then the simple answer is “Yes.”Otherwise, it depends. The purpose of the relay is to reduce the current load on the switch. If the switch’s current rating is more than the current draw of the light bar, then directly wiring to the switch is fine. However, give yourself some leeway by using a switch whose amp rating is 50 percent higher than that of the LED light bar. See our LED wiring guide, to see some in depth info regarding wiring.
Once you have mechanically installed your new LED light bar, it is time to give it a steady supply of electrons so it has a steady supply of night vanquishing power. Learning how to wire and LED light bar correctly ensures reliability and avoids unsafe operating conditions or damage to your vehicle.
Relay is safety for the switch and the power of the circuit
Led light bars :http://www.ddl-lighting.com/
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