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LED Light Bar Wiring Question

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Old 10-20-2014, 07:40 PM
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Default LED Light Bar Wiring Question

I'm not a very electrical-savvy person. So my question regarding my LED light bars is how would I go about wiring two LED light bars to the same switch?

Will there be any side effects to connecting both harnesses to the same electrical connectors of a single switch? Any lowered current or wire melting?

Both light bars came with their own wiring harness. Any information regarding this would be very helpful.

They're both small LED light bars. My 50-inch will remain on its own switch, but my 12-inch LED light bar I'm wanting to wire in conjunction with some small LED pods. So the electrical draw shouldn't be nearly as much as the 50-incher.

Last edited by thatXJguy; 10-20-2014 at 07:43 PM.
Old 10-21-2014, 10:24 AM
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Anyone on this?
Old 10-21-2014, 10:29 AM
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Did the supplied wiring harness include it's own relay or was it intended to wire directly to a switch?

If they did not include a relay I'd wire your single switch to control a relay and run both positive wires from the two light bars to the relay. There's nothing wrong with that. Just keep in mind that running 2 lights is going to double the current draw so choose a relay that can handle it.

I definitely wouldn't run two 12" light bars are a single switch. That's just asking for trouble.

I'll draw a diagram for you if you need it.
Old 10-21-2014, 10:42 AM
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Originally Posted by Lowrange2
Did the supplied wiring harness include it's own relay or was it intended to wire directly to a switch?

If they did not include a relay I'd wire your single switch to control a relay and run both positive wires from the two light bars to the relay. There's nothing wrong with that. Just keep in mind that running 2 lights is going to double the current draw so choose a relay that can handle it.

I definitely wouldn't run two 12" light bars are a single switch. That's just asking for trouble.

I'll draw a diagram for you if you need it.
The 12-inch light bar came with its own harness that includes a relay.



I'm planning to attach two small LED pods to the same switch.



It looks like the 12-incher has maybe a 6-7 amp draw, and the pods have a 1.3 amp draw – and there are two of them.

If you can draw a diagram, that would be cool. I'll look at the specs of the current relay in the next hour or so and report back.
Old 10-21-2014, 12:01 PM
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The relay is definitely a 40A relay. It should be plenty. And I believe the fuse is a 20A fuse.

The only thing in question right now is how many amps the switch is designed for, but since it works with my 50-inch light bar, which is 17 amps, I think it would work with the 7-amp light bar and 1.3-amp LED pods just fine.
Old 10-21-2014, 12:18 PM
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Since the 12" light bar came with a relay just splice the positive wires for the Pod lights onto the positive wire at the 12" bar.

Standby for diagram.
Old 10-21-2014, 12:33 PM
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Please pardon my 2 minute paint scribble of a relay wiring diagram.

Name:  Relay_zpsb97f7db1.jpg
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Make sense?

All you should have to worry about is splicing the positive wires for the pods into the positive wire that runs from the 12" bar to the relay.

Also, I forgot to draw a fuse between the battery and the relay. Surely there's on there in the harness that was supplied.
Old 10-21-2014, 01:15 PM
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I got you.

If the pods come with their own harness and splicing is not necessary, is there a way to connect it that way instead? I guess splicing is more of a last-case scenario for me. I like when things are removable and not perma-fused together lol.
Old 10-21-2014, 01:18 PM
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I highly doubt those small lights will come with a relay harness but if they do you just need the single switch to supply power pin 86 on both relays.

You're going to have to splice something to make it work like you want.
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