Author Topic: Installing a LED bar  (Read 221 times)

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Installing a LED bar
« November 14, 2020, 14:28:00 »
Hello! Im new to the forum and doing the best I can with my bad english. I own an i30 T-GDI 1.4 ym. 2020. It has LED driving lights (high beam too).

I've bought an Optibeam LED bar with relay and wires. I also bought a CAN relay, but the guy in the shop told me I dont need the CAN relay and the remote current
to the LED bar can be taken straight from the high beam lights. Is this true and has anyone done it like this? Since the current in LED lights is quite small Im afraid its not enough to activate LED bars relay (even though its 12V). Im also interested in knowing which wire goes for the cars own high beams. I have a pic of the connector which I believe serves the whole light unit(?).



There are two grey wires and I believe it is one of those two.

Thanks for help in advance :)!

-Aleksi
« Last Edit: November 14, 2020, 14:50:32 by Axu » »


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Re: Installing a LED bar
« Reply #1 : November 14, 2020, 16:40:38 »
Hi, Aleksi. Welcome. Your English is fine. I do not believe you need to worry. The activation of a relay works on voltage, not current. The switching will not care how little current will be used. Even with the LED bar disconnected, the relay will still try to switch it.
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Re: Installing a LED bar
« Reply #2 : November 14, 2020, 18:05:10 »
Thanks Gonz! Im new to the electronics of the car so I've got a long way to go. Thanks for the info. As I studied this subject I understood that the problem on new cars is the continuity of the current. So basicly if I find a wire that has continuous 12V current when the high beams are activated, I can use it as a remote current? Correct me if/when Im wrong :). There is very little info about this whole subject on the internet.
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Re: Installing a LED bar
« Reply #3 : November 14, 2020, 19:08:00 »
Which model Optibeam did you get? It should say how many Amperes it will draw.
If the current is not excessive and total high beam current remains well below the fuse rating, you can connect it directly to the line that powers the high beams without using the relay.
If using the relay, connect the SOURCE contact on your relay to a BATTERY feed and the COIL contact on your relay to the high beam feed. The point of using a relay is to not stress your high beam current.
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Re: Installing a LED bar
« Reply #4 : November 16, 2020, 02:07:47 »
I put a lightbar in my PD i30 the information for what i did is below in the post. I installed a relay straight off the battery with a wire that tapped into the loom just behind the headlights to get the high beam trigger wire. This was to comply with the law in Australia so it can only turn on when the high beam is on.

The light bar itself is powered off the battery.

:link: Lightbar / spot lights behind front grill
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Re: Installing a LED bar
« Reply #5 : November 18, 2020, 23:20:30 »
Thanks for sharing. Excellent! :hatoff:
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