You asked: Do I need a relay for LED lights?

Can you wire LED lights without a relay?

Yes, one can wire an LED light bar without a relay. … If you are not sure about the switch, fuses and wiring being of the right size for the amperage, then you should use a relay to avoid something bad happening.

How many amps before you need a relay?

Most automotive relays are at least 30A (check the specs to make sure). This means they can transmit 30A without issue. The fuse holder you are looking at, however, cannot handle that much amperage.

Why does my LED light bar have 3 wires?

LED Lights with 3 wires will be a multi-function light. They can (most times) be used in whatever configuration is right for your application. For example, running and brake, running and blinker or brake and blinker. These LED’s will usually have a black, red and white wire.

What does a relay do for lights?

What is a Relay? A relay is an electrical switch. It allows a low current “switch” circuit to control the electricity flow of a high-current circuit load, like your LED Light bar for example.

Do you need a fuse for a light bar?

Premium Member. You are correct, the light bar will draw 5.4 amps at 13.8 vdc or 6 amps at 12 vdc. According to the switch specs, there is no integral fuse.

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When would you use a 12V relay?

12V DC relay switches are the best solution for full voltage applications, as they allow a low current flow circuit to control a high current flow circuit, like a vehicle’s horn, headlights, auxiliary lamps, fan motors, blower motors and countless pieces of equipment existing on vehicles today.

Does relay need power supply?

Most relays are available in different operating voltages like 5V, 6V, 12V, 24V, etc. If the required operating voltage is supplied to the relay, the relay is activated. … Small signal relays and low voltage power relays are usually in DC, but mains control relays and contactors quite frequently have AC coils.