Question: Do LED lights require a relay?

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.

At what point do you need a relay?

One of the most common situations that require the use of a relay occurs when an application needs to switch from high to low current (or vice versa) within the same circuit. For example, the temperature sensors that power HVAC units require levels of amperage that vastly exceed the capacity of their wiring.

Do you need a relay for a small light bar?

So in short if you do not properly wire the light bar to a battery and use a correct amperage switch which will keep the light bar on it’s own independent circuit a relay is unnecessary. However if you tap into the high beams or another lower voltage switch then you will need a relay to avoid an electrical fire.

Why use a relay instead of a switch?

While a relay does add an extra step to the switching process, the main advantage is that you can leave the actual switching of high-power circuits for things like off-road lights or air compressors in the engine compartment, and control that switching with a much smaller amperage circuit that energizes the relay’s …

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What is a 12V relay used for?

In 12-volt automotive circuits, even small resistance amounts can cause significant voltage drop. Relays provide a solution by shortening the required length of the heavy-gauge, power-delivery wire from the battery or alternator to the load.

How many amps does it take to trigger a relay?

No the 12 volt lead from the switch to the relay will only carry about 1-3 amps it’s just the trigger wire to trigger the relay… it’s low amps you can use 12-18 gauge wire for that.. for the main coming off the relay going to the light bars you should use 10-8 gauge for 40-50 amps you will be pushing.

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.

Why does my LED light bar have 3 wires?

This means marker light, running light, brake light or blinker. … 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.

How many amps does a LED light bar use?

55W LED lights are usually in 4-5 amp range. You can also use a high current meter.